4/17/2012 Standards: 7 (Chemical Thermodynamics)

Objectives:● Be able to calculate Specific Heat Problems involving use of J/gºC DO NOW: 1. Vocab words on p. 489 – write definitions and explain as best you canHOMEWORK: 1. SN Ch 16.1 p. 216-218 (2 pts) Std 7 2. Ch 16.1 PP's p. 492 & 494 PP's 1-6 (show calcs, do not use formula in

book) (3 pts) Std 7 3. Watch all 4 videos in #3. Problems 4 & 5 worked out in detail. 4. You may want to watch the conductivity demo I did last week at the

link in #4 of HW page===========================================================STAMPS:   NONE

Specific Heat

Textbook p. 492Table of Specific Heat for several elements

Density - Problem Types (3)

1

2

3

Specific Heat - Problem Types (4)

1

2

3

4

Starting fraction if we are finding J Starting fraction if we

are finding g or deg C

4/18/2012 Standards: 9 (Chemical Equilibrium) Objectives:●  Be able to calculate problems using specific heat without the formula

q = c x m x ΔT● Energy of Activation keeps most reactions from being spontaneous (thermite). ● Catalysts lower the energy of activation (vid. energy req'd to start reaction). ● Be able to write equilibrium expression for reactions.DO NOW: 1. What do each of the letters mean in this equation? q = c x m x ΔT see p 493 2. Define joule (J), calorie (cal), heat, chemical potential energy HOMEWORK: 1. Ch 18.1, PP's p. 565-568 1 (a-c), 2 (a-c), 3, 4 (2 pts) Std 9 Ch 18.1 Assess, p. 591 52 (a-b), 53 (a-b), 55, 56 (3 pts) Std 9 2. CST 80-90 (non-calc probs - correct ans, reason, p. #, calc probs show given,

find and calcs (5 pts) Std MISC=========================================================STAMPS:   ●  Journal 4/17 1. SN Ch 16.1 p. 216-218 (2 pts) Std 7 2. Ch 16.1 PP's p. 492 & 494 1-6 (3 pts) Std 7

RESPONDERS

Staple all papers Please

http://www.sciencegeek.net/Chemistry/taters/CST.htm

CST Released Questions - on-line interactive

print

Both links on today's HW page

http://mrwiggersci.com/chem/TestsQuizes/CST-prep/STAR-chem-2010.pdf

also know as kcal

big CAL

density = mass volume

mass volume

volume mass

if find = mass if find = volume

start calcwith this

start calcwith this

1 The find is _____________What will start your calc. ?

A

B

mass volume

volume mass

density problems

specific heat = J g°C

J g°C g°C

J

If find = Jif find = gif find = °C

start calcwith this start calc

with this

specific heat = J g°C

J g°C g°C

J

If find = J if find = gif find = °C

start calcwith this

start calcwith this

2 Where will the 2.15 be?

A Top

B Bottom

3 The find is _______ .Which will start you calc?

A

B

J g°C

g°C J

aA + bB cC + dD ------> ------>

Keq =

[A]a [B]b

[C]c [D]d

Guided PracticeWrite Keq equilibrium constants for these equations

__C(s) + __H2O(g) ------> __CO(g) + __H2 (g)

__FeO(s) + __CO(g) ------> __Fe(s) + __CO2 (g)

Keq =

Keq =

__SO3(g) + __CO2(g) ------> __CS2(g) + __O2 (g)

4/19/2012 Standards: 9 (Chemical Equilibrium) Objectives:● Equilibrium Reactions are reversible● Be able to write Keq     EXPRESSIONS ● How to calculate the numerical value of Keq ● hetero- vs homogeneous equilibria DO NOW: ( use handouts to find answers to these ) 1. How do we define chemical equilibrium? What is it’s stylized equation/

equilibrium expression? (yesterday's handout, 2nd page at top) 2. What does homogeneous equilibrium mean (today's handout)?HOMEWORK: 1. CST 1-10 (5 pts) Std: MISC

if no calcs needed give page# from book and brief explanation. For non calc, if great explanation, no page # not required.

2. Ch 18.1 Assess p. 568 6,7,9 Ch 18.2 Assess p. 574 10, 11 (a-c), 12 (a-c), 13 (an exothermic reaction where heat is a product) (a-c)

=========================================================STAMPS:  ●  Journal 4/18 1. Ch 18.1, PP's p. 565-568 1 (a-c), 2 (a-c), 3, 4 (2 pts) Std 9 Ch 18.1 Assess, p. 591 52 (a-b), 53 (a-b), 55, 56 (3 pts) Std 9 2. CST 80-90 (non-calc probs - correct ans, reason, p. #, calc probs show given,

find and calcs (5 pts) Std MISC BASKET

BLACK TRAY

4 The find is _______ .Which will start you calc?

A

B

J g°C

g°C J

specific heat = J g°C

J g°C g°C

J

If find = J if find = gif find = °C

start calcwith this

start calcwith this

5 Where will the 2.15 be if find? ____________

A Top

B Bottom

Specific Heat =

aA + bB cC + dD ------> ------>

Keq =

[A]a [B]b

[C]c [D]d

http://www.mhhe.com/physsci/chemistry/essentialchemistry/flash/lechv17.swf

Interactive Applet to view for yourself what happens during equilibrium shifts (link in HW page tonight.

Guided PracticeWrite Keq equilibrium constants for these equations

__C(s) + __H2O(l) ------> __CO(g) + __H2 (g)

__FeO(s) + __CO(g) ------> __Fe(s) + __CO2 (g)

Keq =

Keq =

__SO3(g) + __CO2(g) ------> __CS2(g) + __O2 (g)

BLACK TRAY

4/20/2012 Standards: 9 Objectives:● Review HW, Keq expression, and figuring value of Keq ● LeChatelier - factors that cause “stress” to equilibria - conc., pressure, & temp. DO NOW: 1. Zumdahl Equilib. probls (handout): 26 (a-c) answer on your own paper. HOMEWORK: 1. Zumdahl Equilib. probls (handout): 35 (a-c), 36 (a-e) (5 pts) Std 9 2. CST problems 11-20 (5 pts) Std 9 ====================================================STAMPS:   ●  Journal 4/19 1. Ch 18.1 Assess p. 568 6,7,9

Ch 18.2 Assess p. 574 10, 11 (a-c), 12 (a-c), 13 (a-c)(an exothermic reaction where heat is a product)

2. CST 1-10 (5 pts) Std: MISC BASKET

Starting today

JournalsWrite date to left of the "margin line" on your paper

----- penalty - no stamp

HomeworkWrite problem # to the left of the "margin line". If there are a, b, c, etc parts of the problem, write those to the left of the "margin line"

----- penalty - 1/2 credit for HW

4/26 (next week)Starts 7:00pm

Keq =

[N2] [Br2]3

[NBr3]2

Demo equilibrium CoCl2 (aq)

CoCl42- (aq) <===========> Co2+ (aq) + 4Cl1- (aq)

BLUE PINK

Problems 26 (a-c), 33 (a-c) & 34 (a-c) of "Equilibrium Probs from Zum Text".

Problem 26 - follow directions in the problem for a-c. Do these problems on the "LeChat Prob form for ans" (2nd printer icon).

Problems 33 and 34 you must use the chart "LeChatelier Problems - format for answers"