21
Name: •=,i-=- 4 - 23:A,,/F X0312Spgl7 -Ksp, Thermodynamics & Hlectrochemistry •,.. ID:A 1. What is the solubility product expression for Al(OH)3? §} g;::ff3:+:I;8H=]=3]3 #`,' z~,7=z,:, xp+ =' q_,,~ 9,,Z:::[£:::i:3oHT]13 ;:ys ..-. r -`" - 2. What is the correct mathematical expression for finding the molar solubility (J) of Sn(OH)2? n ~ Lj=,j%4z-i-- e* ,B -==-- •f i _ `. g r-... I :=pri i-`/ ,' ,,i ,.,- `-}pe-- <.---,-, J7_i :==- /f±:. E] -I-- 3. The solubility of strontium carbonate in water at 25°C is 4.50 x 10-3 gEL. What is the Asp of this J,` ,1 L=p ,i ,` i T={;-;;-a_p, =^ ,.,:: };:`+; c®~- i{4p.if e~_ __----ir-I- --f a.I-`J=-: €£ : -:fJ -; \-, -:: ,,-, : --,-;-;:=\.) sparingly~s_a AL2j9apT`-o-, 8) 1.13xl0" C) 2.34x|o-17 D) 5.52x|o-3 E) 3.12x|o-2 A_`:p€S*`r_..-;-.~-`6de-_7=3f2±rf¢ 4. The solubility of lead(II) sulfate is 4.0 x 10-2 g/L. What is the solubility product constant for :id(:I):s:u|:fi:tj?-> -/;€| ?i-/;;-?-;£ i fi dr--.-- ;`` -"=`f~.` ,.L. --L__€ i; i;;:i::: *4__ :~ ` ±~=37==dr¥aAj, =z;i,zq\„,# lub;!z¥,: -_-/';:-## .,---- :. , :-- i,? ;I; #:sv:2;pis:2.;.;,iol-io,, / ,--,. /-i--`; r,9 F+-<= ,<"/ -,-, `#3%+,-l A ,-.,, ^j,",`:,:`-) `^ cpr . ? /. , t, I ' ` =r=-.A;,,-.::ff=fj:=±.fJife ---` ----- I.-~ ---- ~-=';-ii- -.i-:;:I..;:,_: - /,)lfx/a 5. Which of the following salts has the lowest molar so A) Src03(Ksp=9.3 x 10-10) ,. ' s=>_'`~~p,,z¥? C) BaF2(K„=.`|.Ox_lone)_ ' i pT* -- Bas04 (Ks;~= 1.1 x 10-[°) '`. -T8xl-o-l-,-~------J`---:----4,/ ;--1.1 x 1o-1o) ,`.

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Page 1: lub;!z¥,chemunlimited.com/X0312Spg17 - Version A.pdf · 2017. 5. 5. · How much heat is liberated at constant pressure if 0=834 g of calcium carbonate reacts with 48.9 mL of 0.668

Name:•=,i-=- 4 - 23:A,,/F

X0312Spgl7 -Ksp, Thermodynamics & Hlectrochemistry•,..

ID:A

1. What is the solubility product expression for Al(OH)3?

§} g;::ff3:+:I;8H=]=3]3 #`,' z~,7=z,:, xp+ =' q_,,~

9,,Z:::[£:::i:3oHT]13 ;:ys ..-. r -`" -

2. What is the correct mathematical expression for finding the molar solubility (J) of Sn(OH)2?n

~ Lj=,j%4z-i--e* ,B -==--•f i _ `. g

r-... I :=pri i-`/ ,' ,,i ,.,- `-}pe--<.---,-,

J7_i :==- /f±:.E]

-I--

3. The solubility of strontium carbonate in water at 25°C is 4.50 x 10-3 gEL. What is the Asp of this

J,` ,1 L=p ,i ,` i T={;-;;-a_p, =^ ,.,:: };:`+; c®~- i{4p.if e~___----ir-I-

--f a.I-`J=-: €£ : -:fJ -; \-, -:: ,,-, : --,-;-;:=\.)

sparingly~s_a

AL2j9apT`-o-,8) 1.13xl0"C) 2.34x|o-17

D) 5.52x|o-3

E) 3.12x|o-2A_`:p€S*`r_..-;-.~-`6de-_7=3f2±rf¢

4. The solubility of lead(II) sulfate is 4.0 x 10-2 g/L. What is the solubility product constant for

:id(:I):s:u|:fi:tj?-> -/;€| ?i-/;;-?-;£ i fi dr--.-- ;`` -"=`f~.` ,.L.--L__€

i; i;;:i::: *4__ :~ ` ±~=37==dr¥aAj, =z;i,zq\„,#lub;!z¥,:-_-/';:-## .,---- :. , :-- i,?

;I; #:sv:2;pis:2.;.;,iol-io,, / ,--,. /-i--`; r,9 F+-<= ,<"/ -,-, `#3%+,-l A ,-.,, ^j,",`:,:`-) `^cpr . ? /. ,

t, I ' `=r=-.A;,,-.::ff=fj:=±.fJife---` ----- I.-~ ---- ~-=';-ii--.i-:;:I..;:,_: - /,)lfx/a

5. Which of the following salts has the lowest molar soA) Src03(Ksp=9.3 x 10-10) ,. ' s=>_'`~~p,,z¥?

C) BaF2(K„=.`|.Ox_lone)_ ' i pT* --

Bas04 (Ks;~= 1.1 x 10-[°) '`.-T8xl-o-l-,-~------J`---:----4,/;--1.1 x 1o-1o) ,`.

Page 2: lub;!z¥,chemunlimited.com/X0312Spg17 - Version A.pdf · 2017. 5. 5. · How much heat is liberated at constant pressure if 0=834 g of calcium carbonate reacts with 48.9 mL of 0.668

X0312Spgl7

.A' 6. Rank the following salts in order of increasing molar solubility.

i i :j!`1-+r / I

S alt KapBas041.1x|0-10

Agcl 1.8x|0-10Bac03 9.1 x 10-9

f i ;i ;,,,,,--, / A

Cds 8x|0-27 ,~Pbs041.8x 10-8 .`J`-+`}

A) Cds < Agcl < Bas04 < Bac03 < Pbs04Br)>.~zQdg-<~JtREftsELOL£SBatELpbs04

s_P_P_S9-4u`~`)Cds < Bas04 < Agcl < BacoD) Pbs04 < Bac03 < Agc1 < Bas04 < CdsE) Pbs04<Bac03 <Bas04<Agcl<Cds

ID:A

{\,__ ,,,, r.` a-' /p<Q'J/:':e;-pe i/-::;? I:'.

7. What is the molar solubility of bariun}_fluo\ride at 25°C? The solubility product constant for

barium `ft_ucridejs 1.0 x 1 one at 25oc.

A) 6.3x 10-3A4,,i

Err.deifi=fa-A4C) 5.Oxl0-7A4

D) 1.Oxl0-3A4

E) 1.6xl0-2A4

•-----.. `

• r'__ ,-.- v --.,.---. i

Sl!3£''7 i rf i I ':?:'--,: `e^; :i f i#yrfeSrS ,-,'.-:-

8. In which of these solutions would silSilver(I) carbonate, Asp = 8.5 x 10-12.

£!i±¥L%c£C) 0.01 A4AgN03D) 0.1 A4Na2C03E) purewater

v%:I: carbonate have the lowest molar solubility? Forr=93±rfe :-=:r - ¢~3=`s .. a `, `-=*`

i. ke``-`

3_+_~,.:i _ii .! S . € ,/ ki;-FS ;;»de ±S=:-3iF f r+j,.\

9. Which of the following, when added to a saturated solution of Agcl, willmolar concentration of Ag+ relative to the original solution?

-i=jfR?`=3. Mgc~E@`) ' =fe=^

-z-`--i.-r .--`--_---

A) 1onlya) 2only

9~)_3--Only--`'~B-±g==ifr-;

/!! :g';j'JJ+ ~ ; 3= f i ' ...- A.. u *fro^ £,,I if c=je~ 4ff i i:;;f f ira i

F=p> -r: ,a . , f Sj ,4 ,rz .:: , ;a, 1;_±`xffu ` rfe.:#*_id^+S=

3 zr`, i-: , ;;,f r;: 'j ::::4fyr. --gr_i

a - I-±`

. +.---- I-:-: :-=sjF> ,-5

2

Page 3: lub;!z¥,chemunlimited.com/X0312Spg17 - Version A.pdf · 2017. 5. 5. · How much heat is liberated at constant pressure if 0=834 g of calcium carbonate reacts with 48.9 mL of 0.668

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if rf t]M~; = 8, `;fa`fF,,~ 'L

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Page 4: lub;!z¥,chemunlimited.com/X0312Spg17 - Version A.pdf · 2017. 5. 5. · How much heat is liberated at constant pressure if 0=834 g of calcium carbonate reacts with 48.9 mL of 0.668

X0312Spgl7

.`,

H¥Eiiii

=-=z`

i,- ( J,,`/'~t

-.`.. ``

-~- C-( '

L'

ID:A

10. A 4.0 x 104 A4 solution of Mns04 tis gradually made more basic by adding N_a_9.H. At what pH willmanganese(II) hydroxide begin to precipitate? For Mn(OH)2, Kxp = 2.0 x 10-13.A) 4.70

\k¥:;` rd--J--t9J /'€rfeJ lfgr '4#`i gr

11. What is the maximum hydroxide-ion concentration that a 0.027 A4Mgc12 solution could havewithout causing the precipitation of Mg(OH)2? For Mg(OH)2, Esp = 1.8 x 10-[].A) 4.2 x |o-68) 1.7x|o4C) 1.2x|o-8

D) 6.7x|o-9E) 2.6x|o-5

±< f jf -*,fr,.

12. If 270 mL of 1 x 10-7 A4AgN03 is mixed with 270 mL of 1 x 10-8 A4Nal, what will occur? ForA8I, Kxp = 8.3 x 10-17.

A) Sodium nitrate will precipitate.8) Silver(I) nitrate will precipitate.C) Sodium iodide will precipitate.D) Silver(I) iodide will precipitate.E) No precipitate will form.

^cf-icJpr_4 r'/;;3fJ ; ,.,,-. ': .:I.''r, ;:fir /:;;i:.Ii/

::`_rfep-i;-i;--->

13.|nwhichofthefollowln8Solutionswouldcac2:4rfehave{h|:i:;gh;:;;;;m##L;:,rs°L#±#tyc?G,_ctA) 0.01 A4Na2C204 ,\``:+,,':,',z''"a.`~.a +``

8, o.otA4NacL ,,,, _ A S_ arm_ >, 7

/f±+:iT3a;,_fsJ^:;.~.=f=±''i-,:P`::sat:..I-:;AF.,,,I..^'.:vi3.tco`frf:.-- .i= ,--.

/• / (-Lc€

freer-~O':~OT h4 Hcl

E)) ::: %£:gc°233: # `ap: -J~, =t= `3.+ A++ j9 F#: i*o#2L`tr_,i.=`;_riri,'¥„ „(

14. What is the value of the dissociation constant, Kc7, for the complex ion Cd(NH3)42+? For

CdovH3)42+, A/ 1.0 x 107

A) 1.Oxl0-7

8) 2.5x|o6\

C) 1.Oxl07

D) 5.6x|ol

- E' ~ 1.o---;i_6j ---- ``r``` _

/:€ffpe-- ±f - i-/ rf - I FJ '

3

Page 5: lub;!z¥,chemunlimited.com/X0312Spg17 - Version A.pdf · 2017. 5. 5. · How much heat is liberated at constant pressure if 0=834 g of calcium carbonate reacts with 48.9 mL of 0.668

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Page 6: lub;!z¥,chemunlimited.com/X0312Spg17 - Version A.pdf · 2017. 5. 5. · How much heat is liberated at constant pressure if 0=834 g of calcium carbonate reacts with 48.9 mL of 0.668

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Page 7: lub;!z¥,chemunlimited.com/X0312Spg17 - Version A.pdf · 2017. 5. 5. · How much heat is liberated at constant pressure if 0=834 g of calcium carbonate reacts with 48.9 mL of 0.668
Page 8: lub;!z¥,chemunlimited.com/X0312Spg17 - Version A.pdf · 2017. 5. 5. · How much heat is liberated at constant pressure if 0=834 g of calcium carbonate reacts with 48.9 mL of 0.668

X0312Spgl7 /` :i /-, T ID:A

19. How much heat is liberated at constant pressure if 0=834 g of calcium carbonate reacts with48.9 mL of 0.668 A4 hydrochloric acid?

Cac03(s') + 2Hcl(czg) + Cac12(czg) + H200 + C02(g); Aft = -15.2 kJ

A) -0.127kJ8) -0.375kJC) -12.7kJD) -0.248kJ

y_.f i: - =±-,? -=>

E) -10.2kJ.,

i 20. The reaction of iron with hydrochloric acid is represented by the following thermochemicalequation.

Fe(S) + 2Hcl(czg) + Fec12(clg) + H2(g); Afro = -87.9 kJ

If, in a particular experiment, 7.36 kJ of heat was released at constant pressure, what volume ofH2(g), measured at STP, was produced? (A = 0.0821 L . atm/(K . mol)) ,,

A) 2.92xl02L8) 2.05LC) 22.4L

ffg2~ + r3 #±rf I - , ;;-= a j ;+ /ifg i drfe £'Tf -+. /-)--: /

I:I+#;9\==,-i:}f:{\\-)fc=gri,f,:-=-:(rty=:`\,.-,--- I -----.- rk,- `=^of ;1y: I cs=-

Jfr

-'. `. ,-`;i a t:

prfA.-; 'f i

i i 4-3i*£/9A=7--t',if. : `~ :=: rg;;,.ifc::a+ql:...If };;^

Jf;&:`S.:,i:::;::_:,,,_ft¥;=:ifeif;:::::;,when5:§jj=j2££alcium~6=xia=ctswiith'83.9Lof21. How much heat is liberated at constant pressure

carbon dioxide gas, measured at 1.00 atm pressure and 25.0°C?

Cao(s') + C02(g) + Cac03(s); AZZ° = -178.3 kJ

A) nd.iixi02kT L"z,.j

8) -1.04xl04kT j£~'i?'C) -7.97x l02kT {b f/„ I:-

1.86 x 102 kT A- ' '' ~ ' '`' I.':,'/,i. -. i ,a, ,

= / , r3{f .if,.ed t:f'J

- (A = 0.0821 L . atm/(K . mol))

i 7 f i , 3 Af :a_ ;fj =` 7r ':: ¢ ,,` i _ `.,I , .-c'.~;'. -r3rfe' ``q+7~;. `_1rff.`. zj9Gi

` - _ aL-I-- q-`3=

T`,

Jll -`> 7:-";,,a `' ,----, A`,a :4 ?, '£344`-¢ 4#z-

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:-,:_ ,,,-.,- ±€,,. ; .A J ;-a ,r,3B,€-.

.-i=..`.

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22. The specific heat capacity of copper is 2=2§4Jfg.°C. What is the mo±g::±]2gfjj!£J=£g±£}§S

i!2is-aplAT 24.4 J/mo|.°C

kegrolar

8) 0.00604 J/mo|.°CC) 165 J/mo|.°CD) 0.384 J/mol.°CE) 2.60 J/mol.°C

mass of copper is 63.54 g/mol.

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Page 9: lub;!z¥,chemunlimited.com/X0312Spg17 - Version A.pdf · 2017. 5. 5. · How much heat is liberated at constant pressure if 0=834 g of calcium carbonate reacts with 48.9 mL of 0.668

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;9 r 1'. a r7 #:ir'--` ,---, r - lit--JX

` ,,`D\

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X0312Spgl7

`-J Jab

#,¢p,

• ,6 ,'1

ID:A

23. How much heat is gained by copper when 5j=£j3j2££gEEfr is warmed from 15.5°C to 76.4°C?The specific heat of copper is o.385 I/(g o oc). ro-k`+rT~-``~-- '~'=i-I--

A) 3.09x|02T8) 29.41JC) 23.45J

I D) T.2rxioui)- T5-2~*i63 I

24. A 170.0-g sample of metalcontainer. The temperaturethe Sp'§g.ific heat of the

=f--- i-;I, pi.-2\

1`.,

-- ?-:/,,'p`-r2.?;a-qu-G,

-=-I- /i_ -a f=T=, ,f. :*-£giv`,sf,,

.:: zzeeE47.fjfiFT3b#`±.•`_- ,:9£ 3 . 3 <--;, -==- ;izr€-

=--=: / , -2J_ri=SiS, , J`}

H20`(J)``atl4.tRTcffi~-ianiHTsifaied-ri6-at capacity of the container, what is::#:f#o¥%g:a7£i¥ff:€The s`fia6ific heat of H20(J) is 4.18 J/(g . °C).

A) 4.18J/(g.oc)

:)-£+!f:;6RE J££{ /;-/} /-=C%` = -----E) 28.6T/(g.oc)

25. A 42.9-g sample of cobalt (s = 0.421 J/(g . °C)), initially at 157.2°C, is placed in an insulatedvessel containing 120.9 g of water (5 = 4.18 J/(g . °C)), initially at ±2;2:C. Once equilibrium isreached, what is the final temperature of the metal-water mixture? Neglect the heat capacity of the

8) 55.3°cC) 14.|°CD) 88.2°CE) 31.8°c

J,at-C-_-

=-J2>2^ •L:: :-i -=>

26. For the isothermal (cop4an_t.=``te_mperature) ex]2gE¥iqu of an ideal gas,A) w=Oandg<0.8) w-Oandg=0.C) _t!__<--0£ndD)_, w = 0 and g > 0.

'V, -= yz_i.= #2±->

---,--=>,,,A.!{Pkyf.,fi?

jr ;,' /,-7' ,ff a

\-.-, :-:}=-F:f:-:;

E)-~ii;5|j~fHd-a->||uD _; ,4'<.;en :,~a .I,yzL' r^ . |!

<g= trgiv F=irs^r,i:`i.Svst. S

ialeatiri.fiA'rfeir\eseut##,/-i--\-@€4+-A,~?, -I rf ,,=|~ZS `

27. AfJ and AU are nearly the same in all the following processes £2Egfp±A) F2(g) + H2(g) i 2HF(g).8) CH4(g) + C12(g) + CH3Cl(g) + HC1(g).C) C6H6(S) i c6H60.

-E;---%:s?H2(g) + Cu(S) + H20(g).

i 203(g).-- _ _"

/A

f' ,--. ;!/ t!d` ;, J,:i-- /-,#f . i,A f ,)

I : .=`

\

y:I,.a .:-jtv`S -,: ,€c -:I --., r9 ±'y;;;# `:>A

6

stbrfu

`,', .S& i,:: =avict>=-of ,a i`

Page 11: lub;!z¥,chemunlimited.com/X0312Spg17 - Version A.pdf · 2017. 5. 5. · How much heat is liberated at constant pressure if 0=834 g of calcium carbonate reacts with 48.9 mL of 0.668

\

€J,. , j .A/,,7rJ8r,,'¢¢-frS;``/@%!Sff:a+;gr{Jerfi7:/give_/t4rfr=F__

Ir,„,,-, a-fi -/,o,,p®(£ -Jr± ;,-,, £&cj:i- €#f ,#,#-:or;,:-:-=` / p,.¢ ,.<€|--,®S--:3,rf ,,,

:i 2 = #ife£.,; 3,£4~3 I tenif i

Sr ;7Ogr{ff_J`.,,' /#,. /9 -7gr;J:3_~_

EL-Ei.

=>fr£ ``/70 ifr:`ed_`x

I--=>`,;,I/,©f£

\-±-i,i- fe

=-fflr=> ifrty I-y,I-.;,1£,,J':;, rif, ,/ P3 :_i-;,,-¢-

_i,,, r%fio,ti?7,rj-2f

=> C:.]= :,i,;i-,9fuJ.+J-1,`)

+a

Eiiii

rty=-=` / { p£;;/ ,,I f ` ---i:<f&€:'¢4,,S

.fi

---i- !,f tyilc._ #.E-'-;F3,,,q;` Tg5i. fA

9E=E/

a,_ , . .

„.j` ,¢. i

+i/7o(I)f`d2p¥*= - I -

njJJraul

FE--72-.3m)-ff

372-,3

:-is p' ,fttlEE,

-i,i::==--..`..

..

ar-...-- :: , `

' £'-a ,,,:£

I T= i:ff2fa;-S)ti {f=

r\t-/3,-/;g;~

-/-.--- giv- +,__<rj

_-::_:i`jdi-I

/¢,`i£

Page 12: lub;!z¥,chemunlimited.com/X0312Spg17 - Version A.pdf · 2017. 5. 5. · How much heat is liberated at constant pressure if 0=834 g of calcium carbonate reacts with 48.9 mL of 0.668

--a = $3-#- ~~Ji.al• .t ` .

---.- `

ic3~7,2:,{;\_A+i;2::pfdrfi>l£Lo@~.19,-2£;\

/3:S,a ,.

;i++--+ +-aca.-i€+farm..i. i

-.-`#f ,-,t\{f} i f ----

+ifti€edf%2drF®

\:42,g;;:a,ofEfff:j`7Trftryffes3,2©tiff;:{:fo,93if\fr\:,:fanfu;:;a:._-I Of f%• _/#pprf ic_`; i;9pSf ifl/ !5 .;fr_, ,:£._:`fi_y]€|.::`> i/,ey,;-H ::

/::r, I,t9;Sifl/ ,I, Ai_I ,_fe4.-de'€`-`ff y€'': t''"' `; a / €~fE.~,-> I -,,--

i- ":\`ffi r9 , (i : ,:F¥: , ,rA-€--A/I

/

a

\ .,,J! i;if ty7 ,p'\:j r c#,,i 2,.!},i_7F#„ fr77,F;,

\ a Frf`_:* 3a

±>i /Prr / (7fF-/ r?,£jT', <, ^4 ;`f-©g st ';'i\:ffS - : -rf ,\.

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-,=:i

iiEEIEE

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--al'.- a

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.

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- --:zi,.

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--f I-p ,.i-.J'Ll,, fr

em-,-rut--„

a--~,) I,',`F

.s3fr';

/7,i27#

EH!Hill.E=-7±-fi77fi),gru±st%#

+f7)~r,erJT#-ae'ff~~97//=,4£-__

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Arf i,A i = rf 7S ,9 8% nr4:i

'-,;ffi6;

irjrgivfl_fyi:_`_._i:;:i€J!

._-_-ap,.,_=.==.

•.`!

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X0312Spgl7

28, Agas4,€;;I:/,.i.f

absorbs 0.0 J of heat

ID:A

jeff-,F .(/i +-q, ,A}<-3 -F';and then performs 77.0 J of work. What is the change in internal energy

ha__a.a.__-----.-

(if {\/ j:£fyRE ;,!= 8:::;i jt,_J==± -27d-:I =--7gj

.\

C) 117.OJ

D) 76.6JE) none of these

i-J`~ 29. The standard enthalpy of vaporization of Freon-10, CC14, is 29.82 kJ/mol at its normal boiling

7 7/) point of 77°C. What is the change of entropy for 1 mol of liquid Freon-10 when it vaporizes at itsnormal boiling point?

A) 8.52x 10-2J/K

JK

EE

4/J9:w= #9,i i 2~;a:~ -rSpas)£@ ff7:: :: I.-,ir;givITng,-,`

ef± i: : 3 33 ~;z-;: ,rf

_i,:--7,a ,€=,Eiiiiiii

'=~-~^'de;!;=T4g:`9=::'d>fa=dRE>±±±==

E) 3.87xl02J/K ,, ` i gg:~2.,£;#di ``3

i 30. At the normal boiling point ofo-xylene, AIJ°vap = 36.2 ^kJ/`;;araniffiffia+i-ng6-.7J;fitinIr6i. K)..What

i:~z,,3,,)is the normal boiling point of o-xylene?A) 314K8) 373KC) 115K

I) 418K

a

4!lif=7ztrd--`±7=3,±, 2.- 17=,;jig;2

{26::2fr5=7

/i /fq it= i if f`r tf'='f± --(xp3/£f , / ,€2 I ,2 givly,f i-±=?

-.*d

``±-~;--T ------. €z '`-' `' /heal ic ,,,.... ___ .+-~~-~ ---- _-i---i---_31. In which reaction is AS° expected to be negative? 4fcza`=giv ,'!T rTg±#'f= ,i -`'p f5=£ {`;;';._,. '#

i.- ,ZapA) ?C2H6(8) + 702(8) + 4C02(8) + 6H200 '*T2'#an tE-5 `¥-# =\,\ 4£ \.:`T*€_ al

8) GaoiGa(S) zf9->Lf givp,pr~ , t,i A,,if 9;£j-=r`al~ -=\, d#j:C-ef,`-` t,a `c) H2oo +2so2(8) + H2so4o ,f#:;i -`yL~->¢`r',i-`` t rae,=zrfu;I,¢2 ,..,,,,'=9`,_..3fr~g& ,'2J=£` 'g

i Vfro -3= oG2!f r„ '' ':_ ._? -. - z , ry '`' -,:`-`;.-TJ ^^.::I-,',) i4 .I < £al

# ;:; tf i -'& i ffctpef i-i 2_ I` a_r3=g ...... __~r

- 8 ,;f:`,.. f i,

E) all of above,.~---.---±ii= __-,=j:-=---iJ- -,`S-

For which of the following reactions is AS'° at 25°C closest to zero?t -.,, rty --. ` , #, ``3 '==; ed-i.,-`7`'='=-i,.,i£;T;`'J,,`,A) N2(g)+02(g)i2NO(g) a+ #=// /7

-j= ty ,,-cttr.

8) H2(g) + 12(s') i 2HI(g)C) CH3CHO(g) + 5/202(g) + 2C02(g) + 2H20(g)D) 2NO(g) + 026) + 2N02(g)E) C2H4(g) + Br20 i c2H4Br20

7

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X0312Spgl7

G~ 33. Forthe reactionN2(g) i 2N(g),

W2_S` fr-2J!\J±3, i J'

ID:A

•,£JL;--1 A) Afz<OandAS<0.8) Af7>OandAS<0.C) AH<OandAS>0.

dioxide at 298 K?

B>=3fr =,J '.-: `\ ,.- 'irf ri

//; -,,- _ £?-i-A,-r. :);, £7,,,-,S/rf

dE!EEdj^ `f4;atee I e rfi i , :>,i,fy i_A ¢_; :.,.fi, ,I,xj : g;edf.

##mfa:f4€:\ i,i:::A,;,: :;:::. ::::. :#`:£ `;:£:f=:, ;:,; ,,I#m (f`aeff E?,4 z`' *r- ~_,

34.Yha.t.isth:s±¥§ein¥pywhen0.100gr-6fsiliconisbumedinexce;`s-Loxygen-toyieldsilicon

Si(f) + 02(g) i Si02(I); Ago = -182.4 J/K at 298 K

#ti,; 2;¢d I /' ( _F ; = f3F% -- 0,@C)3r7 yLA.rty4_ I i@i c-, 'ke

/froifrfJbe.f;i,:$4m!:$9=-/£2.,Cp4A-jKffg#g._r3 ^rj=fr:; drl-f i f a; giv=::'gr ;:-..:. o.nyg f~: .'3:i.I./_: 6fo£P ;-i qJ JIr;g_

`i` `-

A) -182JK8) -18.2JKC) -2.18x 10-3M£

--, `E) -0.649-` --~ ____-`,_ ----------- ~---

35. WhatisA9: at298 K forthe followingreaction? =*?r 6Lr=j% ,,12(g) + Br2(g) i 2IBr(g); Afro = -11.6 k]; Ago

A) -8.02kJ

-15.2

D) 3.59xl03kT

E) -3.59xl03kT

# r€- =-- 4i I:-

=]2,~J,ee¥§:K--`+€Ta^~

I:=,a-f±' .---- I €ap9 Jy

= ,-,,.,: p /c==`; -,,-,::i i ,::` ,d---`

eT- is ich

`5=`--,;:`' -, , ' [g__i--.*--` --.- `- '` ``_ ,---i-

36. Determine AGO for the following

- /fir ICH4(8) + 202(8) + C02(g) + 2H200

SubstanceCH4(g)02(g)

C02(g)H20®

A 8Lm`8 8]8 k]

CI I 1]E'

D) -682.5kJE) -919.9kJ

Afro (kT7moi)-50.72

0-394.4-237.4

•,i-`.-, }rs . -!sO'

•-_,-•-:r ..

?@`ry),EL/:Fi_

_-I

=:;j3.¢a=.74S`2fj£`j_ii-iiiEE«

-9 e^l

6 G. - - +

t-i--1¥_ -A,.: ',I--`3~

---?`}ifed> j'=q= Q` i i. ty`~n,(.-`s+. i - `>=+, ,.

---,£-rty7¥--, F2 ,,: -..- F-\-__ - -

t\~H

/.: ;;' c-: -` :'.L [r} ap :fro:.;=F.'b€w^'::. I-S`_~`al.-:-v::+ _..

'=39 ¥, t# -r£FrT; , ^r, i-in,7 a)+_i i :i;ir-:i==~```,-..`

8

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X0312Spgl7

37. What is the change in free energy at 298 K when lL2£j]±LQ£Q£344 A4calcium chloride is.7 mL of o.245 Msodium carbonate? (A = 8.31 J/(K . mol))L--- I ------.-- _-,-

combined with 73.'H-E=I.

Ca2+(czg) + Co32-(crg) + Caco3(S)

SubstanceCa2+(aq)C032-(aq)Caco3(S)

4fr (kJ/mol) at 298 K-553.5-527.9

-1128.8-/-2k---`tim-k-I \--1}.`1`6 y..ttFi{`, `

i=iiEEae.)

...,,'

; ' - f± -L ,-., ` ,?

if a d;€-I,= - j±-----I_

-rf)--j`_ ',' `.`.

--,

i--,;,1` i.::,,,. F ,

EE

ID:A

-,-- I-3-•.I:' 1f rffi ; - jfi

ySer-:f ii; : a:`--=` -,,,- i r±:--;i:;rty;3- /r-,a.-- = ----,-,_ ^L.i -i -

t:iffr I/t'` i A rF;I i_pj<.`

f!;+` -' . :i)_ '---;=---:i i -\ -fi -i,p^-#per`

38. Given the following, determine K at 298K for the reaction,

al A A:£Q:=#;E;;c:::: - '--J,AgBr(s) + Ag+(c}g) +Br-(czq)

SubstanceBr(c'g)Ag+(c'g)AgBr(s)

5.3 x 10

xl04

C) 1.9x|ol2

D) 1.9x|o-5

Aft(kJ/moo at 298 K-104.0

77.12-96.9

zE

-.',

`E= Ei'

+E= E=

i-±F i ---- i-,-/?-`r-.: ---i ---:;.;f i/_;<

el,~-- - 7 ¢ , c , 2 ± iT-#JjA-.-A-3p -a? 2f a. ,£-I /

±-- =f (:i :3 :, I; i

`.,'= e,--'`-fr/{F--

/#., ::=,;;` i--#l,A ..--,. dyr`y`- -2i±_p. a w/,

E,1.8X,0" 4,-z, = €-Zfi26= JrT3 yz€j-/j?----``\39. Consider the following hypothetical reaction (at 316.8 K). Standard free energies, in kJ/mol, are

given in parentheses.

A=B+C(-32.2) (207.8) (-237.0)

AGO - ?

What is the value of the equilibrium constant for the reaction at 316.8 K?A) 0.42a) 1.0C) 273

zE)L#+ro`4Q,i\

+-::====---lul^

£,rfui: -,-- 7f: i,,;., ,;-/,0`i'

A

/¢;,y'` -== ;:J9

/pGJ*-=-`-i_ ,.. : 1 a -(:_ ,al-

(-=4 "a

`:`

`== a/-_gzgr--:,9

`,.i i --'2;2.2~

-- -jFJ =6ys-

g . t=`,Jgf}-a `g` I ,=` AT + +-ii- i,` .sZ'. g

=--- /!lapI-L

Page 16: lub;!z¥,chemunlimited.com/X0312Spg17 - Version A.pdf · 2017. 5. 5. · How much heat is liberated at constant pressure if 0=834 g of calcium carbonate reacts with 48.9 mL of 0.668

`\`

gr``--:)

-I,a- G

= 3 ,:a,:,:j,_,, ,f p_.>2;3 ft,7,, e~

/

/- fS rJ§----.T

7#,+`.9 oA ,^,i, := .fj,~,;,,., c

/fog a. ; i± -,-, 7 , Jfro`)i. 7 ..-, :-, ,7. al=,-,a a'` I 4 -

~,7' ,-:1 -i., ` 4•, ;a,, . +

3 _ _ --L-- `£

/al:;;:---;{',)i/Ff`

-.- /

Z

a:---- i /-/ I ,;:?, /{9

I:=Sgr z ;< , /_ '::,r'¥ie4`_~,

€,

I-iH_,

-- / 6 tz,7-i i

i t3,z¢r`A feT

i__==

j\

L_

f`rfu=- ?i\

--,,--- `,-; --

<£,-,I

O,00#2fi„.(.`//Zff;jft

-_ - #, ,a G /cT

/¢--:`- j`,. ?/ .--, S- :`

-- ,r` ---------.- lf*=-?:`,,A ---,- ` --tr. ,1BJJa

I ,J1.-+_ / , , -? 3

i +;I //,..}[-,

'- ; ;=7£- ,;;i --.,,--

I : --,f7,z= ,,-,- ;:I,-€. ' /, / _,/,,'f,i)rS-.

(i-`_: Jtp

E5=

E EEEfa

f=,) ^ -.i:_J i -,-- 7 =±J- ;f i,.fJS , , i fty±£f :i.:+Icn=*..i..+,,x:„:+<. --~>-cer~ `

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X0312Spgl7

.`-.,-

/,f.---I'_--'ap \` \

40. A 0.0997 A4solution of a particular monoprotic weak acid, HA, hasis AGO `ior the following equilibrium?

HA(og) + H20(J) = H30+(c!g) + A-(c}g)

A) 28.5kJ8) 34.2kJC) 620kJD) 5.71 kJ

62.7 kJ

r#\ '^,_,

-1 +_

• ~\ `_

ID:A

a pH of 6.00 at 298 K. What

\

I-'pe4fi -.--n= :,=, A A, 4'9

r'^` i;`,. /iffSft,: ffdrt:`or

-- / if ; :J

c,';-i_7i7 ,

id;ggp¥?¥3=::e¥nalM4;a/a:-= ~ i-a,ifej,3:`-G'u_;:``\;/: -„: <f¢ *` if>`:-i sf:-rag-.;-.

A strip of iron is placed in a 1 A4 solution of iron(II) sulfate, and a strip ofdipifeii3~-i-laced in asolution of copper(II) chloride. The two solutions are connected with a salt bridge, and the two

::u:i+:;:gi;e:ico;ne::e±:;::u;:)::n[re EoOo:4:.r)¥_f'= f p /i ~ai `l-I+:i -- ;::r` r. r -,,--.,, a

X;hjcshu#h:e:0:::t¥£ant8t£¥±::np]ea]:::rode.„,A+`^AH~+2£=/,3alG,z=rl

a;E:;pFeert[a[tj6£ing::gen;:~:i:::==:±:±rg]f.Ce[[decreases.;„£#-¥ctrode.:j„onne is produced at the

E) Chlorine is produced at the iron electrode.f3/$7

42. Which reaction would be most likely to occur at the anode of a voltaic cell?<_,_ ------ I-- i ------.---.---- _*i®

A) Pbs04(s) + 2e- + Pb(s') + S042-(c!g)8).C) 2H20(0..2 02(g) + 4H+(c7g)D|~~Pbs04(s)ipb2+(clg)+S(E) 2H200 + 2H2(8) + 02(8)

.'j,,

al c,f:2#9 ;:-+rf -re coTh-`r+3:.,v' ;;`F`\r

I::;` :`-' 43J,I-jJ,,A ---` i-> /;,:;,:)I 'F`

•3t::p±;fr-o-``ffi-

C3`/frorfeaS CjapA ~!: I/ ,fi-i :- < /_ f f:i:`;T:.

10

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X0312Spgl7

J£ 43.

I.:,

',

•7,f#?#,giv

Which of the following statements is true concerning the voltaic cell shown below?

ID:A

#_grhecucathodemassincreasesasthecell8) The Cu anode mass decreases as the cell discharges. /# A+.`C) The Cu anode mass increases as the cell discharges. ¢'.,' {D) The Cu cathode mass decreases as the cell discharges.f;r,E) The mass of the Cu electrode neither increases nor decreases as the cell #-€`

discharges.

44. Which of the following statements is true concerning half-cell I as the voltaic cell shown belowdischarges?

[Cl| increases with time._,-.--.-`

`.`.`:_,-~-i e-i/i:-'\ if/a ,'. :Frfj.-a:se.r f a,;z:€~rS::

i,I . +;__ ,,.. a.,#4 ,/,,,-:--,8) [zn2+I decreases with time, and [C1-I increases with time/Jf' 23~7LLZF /,If.¢.pco4G;

C) [Zn2+] decreases with time, and [Cl| decreases with time/>`yj7f,,I

D) [Zn2+] decreases with time, and [N03| increases with tinrfe';9

E) [Zn2+] increases with time, and [N03-] increases with timed,;`f':.i

11

f7_3pg-f ,z=f4; ,;// -,,.,,,€;-

¢#,&gz#3; e

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`:.'--.-

\-~--

-= frii€-- - i::i-I

i i ;:£„ -'.?;£:fi::-F -;?.a i;®g ,;_T:: -t:':f t`':;9 :;a ':'_: ft--t~_-

> ,`.j ;;` t~_/@r`/,©) i r:*xp.^al`:`' -:=A 3::£=er ;

Es±{, _ ,§A,:ctf i,' «£. i.`-;.!r--.p±`

7o i)rL-4r-

FL/ rff i+.fi::I i

~c{Rflff- i-

+,<- , , _i!

s=23,;a:I-1__:?__E-

-- (+= .--.-- eg,)g££ ,--,1-i,--i,==-i.-.„-,.7-o==--i:=±f ;:;J=:-i--:;f£,;;,, -== -az=-a,,zC

/(_ = i 7 €~',,7 /se __ Sr= Ep?F7~ ys ^ i;/ }_----..A----_-.L

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X0312Spgl7

-..`-.-

•`.:` .

45. In tp,g fi9l|owi.ng electrocp,:¥:i,%lcell, what is the reduction half reaction?

ID:A

Mn(I) I Mn2+(czg) || Fe3+(clg), Fe2+(czg) I Pt(£)

A) Fe3+(czg) + e-i Fe2+(czg)8) Fe2+(c;g)-+ e-i Fe3+(c7g)C) Fe2+(crg) + Pt(a) i Fe3+(czg) + eD) Mn2+(czg) + Mn(f) + 2e-E) Mn(s) i Mn2+(czg) + 2e-

f=p- :ir i-: -r /;:ir+-;:

46. What is the cell notation for the voltaic-cell shown below?

A) Zn2+(czg) I Zn(s) || Cu2+(c!g) I Cu(s)8) Zn(s) I Zn2+(czq) || Cu(s) I Cu2+(czg)

:;,i:--Z;::-:::-.-...-;-:.:I-,:;.,.:I:::.i-:.:::i::::::i-:I:-:i..i-:::.:(i-::-:-:;:i

47. The cell potential of an electrochemical cell with the cell reaction

£]{::3+#iga)t3:t:?(i)ail:I:+i"eel)ect'rical

1,`r

;O,-n-s#1-oiT\8)-` -2.9 X |o3-i

C) -1.7x|o4I

D) -6.4x|06T

E) -2.4x|o5T

\>

work obtainable from this cell when 2;±9j=j2£iAl is

•` ,7 Ofsef2p:•-i---- 4J`) == ---- J [S,iv! :-:::-;-f i

>-``- ey+ ,. a

•),? ,.-,i .; ':`

-(i ,7 a-X. ,I {J

--ft,--77: ;-,,i :i ,/fff,:=:fr

-I

•3`--LT=- I_-+I--4_ , .,/~ ,6r<ch/. -j ~ /~

12

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constructed from half cells with the following half reactions? 4~'

zrf2+¢aq)+2{ >zrtys) Ep--cO.]63v 7 :#g4-.?f29 f~=£:~ >=

ID:A

i 48. What is the balanced spontaneous reaction and s±aLp§g±4_£;s±Lp4e~T±j±Lofan electrochemical cell

-c`--ifc{-„ /,{ ,JT=`,I

•== -r},,r. „ tee -,-- ;%:-/+-,-

-_±©,&F3ififEJT°Tft+a,_-of/

pb2+tog,+2e_ +Pbts, Eo=_o.]3ovt,j#_r,~,ddt

Pb2+(c7g) + Zn(s) i Pb(s) + Zn2+(c}g);¥--y=L`8) Pb(5) + Zn2+(czg) i Pb2+(c}g) + Zn(a); -0.633 VC) Pb2+(czg) + Zn2+(c7g) + Pb(a) + Zn(s); -0.893 VD) Pb2+(czg) + Zn(s) i Pb(s) + Zn2+(czg); 0.317 VE) Pb(s) + Zn2+(czg) i pb2+(czg) + Zn(s); -0.317 V

49. If the cell is initially at standard-state conditions,

iEwhich of the following statements is true?

a.' ,,.- ` ,, \`, -,i

--E`--~`

Er:- a: €= -) ,,-,.--; -,--,::,f i-:•-: -,..- A gr :=i<,; r:

•.--,, `-,-:±fy. 3 i,±

`\\\• ie .&:,-`,`.

i

~eJ-t)

Z;rr2.+(aqh + 2er = rz;"(s).> FJ = ".]6V fa--i: >_`,/!± -~ , t._3

= Cu(S);E°=0.34V f'4`.<`i-'`'aq) + 2er =itially AG = -212 kJ, and it will become more positive with time.

Initially AG i =2T2. kJ, and it will not change with time.C) Initially AG = 212 kJ, and it will become more negative with timeD) Initially AG = 212 kJ, and it will become more positive with time.E) Initially AG = -212 kJ, and it will become more negative with timHEill

50. What is E of the following cell reaction at 25°C? E°ceii = 0.460 V.

cu2+(0.Oi7rty Ag+(0.18A4)|Ag(s)

o.46.§,y:5cCC?=z=?,-` %|i;-:2-:-Z,-t, c =i%-'

C) 0.460V

.. ./.C): :-{:.i , f4-

1 " I,Jfe{~i;.+7,q,,Eg\n

D) o.49oV =-1^ ,-J ---- Z,,/ `r,/``-I- ,f ,,J :,::` :`=

LJ3=:- r? ;, .;,fr;;: ,I, -i..- jc-- >p

13

E) 0.479V

/,4I, I c/-,,`[.;. a.JO

i :i-,,:',,f i.v ;,-fl, i:

/ i--i,,~~F€-= ,g

.7:) I

i- # :i sP-es

egst=``