i*{F Fr{?}ii2E. Draw candensed structural formrfas for pen-

tane and hexane. .Assume tlrat rbe C-H andC-C bonds are understood- 25.1

20. Name the alkanes that have the following mol-ecular or structural formrlas' 25.1

35, Give a systematic name for these alkenes' 25'2

a. CH3CH:CH2b. cH3. ,H\n-

^/,zu-t\H CH,CH3

c. CH3CHCHzCH:CHzI

CH

7G8 Chapter2S

. cH3cH2cH3 I 3'b. cHtcHz)scH, rl[fur*+t'itl,t

HHHHH i"'lliil ithe,c. H-C-C-C-C-C-F 'iT I T T i -- e''honennn *rrb

E, L,fr3\ /Unzun3,rt-t\CH CHzCH3

. CHr:161r69,I

CH2CH3

Draw a structural formula for eathe molecular formula C5H16. Nrpound.25.2Draw all the stmctural isomers molecrla formtda Cull14. Name(For converdence, You maYwislthe cabon skeleton fo each strDraworre structural isomerof acompound.25.3

CH"t-a. cH3-cH-cH3

I

CHs

CH.I

b. cH3-cH-cH-cH3I

CH2I

.Lv 5

CHA CHSl"ic. CH._CH_CH,_C}I_CHtlII

cH2 czllcl{3 cH3

3. Draw a stnctural formula or ca

t. 2-methyl-2-pentenet. 3-ethyl-2-pentene

tll. Show how lack of rotation abol'Qt'kn

n-&n you draw a suuctural isomer of bexanetf*Urnl thathas an aEYemetric cabon? 25'3t3i"* o roo.*t* for each compound' 25'4a. p-diethYlbenzeae. 2-methYt-3-PhenYlPentane,e. p-xylened. t0luene&uin rurry oth of these structues represeilt

CHZCH

CH2CH3

1, 2-diethYlbenz ene. 25.4

fi,.\CH,CH3\\y'\cH,cH3iri

" "r, "qo",ion for the complete combus-

, tioa of octane {CB}IId.25.5l{** *uru *ounals in oder of increasing: hardness: bituminous coal. peat, ligrrite' and

antlEacite coal.25.5i*"u., tlr. chemical struure of coal' 25'5How does the amount of sulfur in coal affect its,r, poteutial use? 25.5

i*iipT },lA51lftY'.:For eacb hydrocarbon picrured below' identiS,.1 tt

"

,yp" oiu"nding and name the compound'

(b)#l,..

::..'

ltil

i8. Y{rite $tru$ural fornulas fcr the foowingcomPounds,a, propyfreb. cyclohexanet. 2-PhenYlProPanert. 2,2,4-aimett4{Pertnea. 2,3-dimethfpentanel. 1,l-dtPhenYlhexane

51, Name the aert three higher horrologs ofethane.

52, Draw electron dot strucnues for eachco*Pound.a.ethene e. ethYne!.ProPane d-cYclobutane

53, Compare ese three molecular structues'Wbicbwould you expectto be most stable?whv?

l_i"--4

5il. The seven organic chemicals produced in theI iffi ffi HIHTL$""T:ffi # ;'j*I ioUowing questions based on the data given'

mounl Pralt*tllnnical (liiBs st f)Ethylene I 15'9Proovbne i 8'4urel I 68EttrVtene dichloride | 6'3eztnt i 5 sEitytbenzen. I 43yinrcnroroe i 37

a. How many trillion kilograms of aromaticcomPounds were Produced?

. Of the total mass of all seven compoundsproduced, what prcent bymass wa madeup of aliPhatic comPounds?

S, Are these nTo structure geometric isoners?Explain

CHs. C}tz H,. ,Htc:cl ,c:c,

H/ tH cH; tH,