Physical Chemistry Third Edition

1314 K Answers to Numerical Exercises and Odd-Numbered Numerical Problems

d. ∆Ssurr 1898 .3JK−^1

∆Suniv 1725 .5JK−^1

3.20

a. ∆S◦− 326 .607JK−^1 mol−^1

b. ∆S◦− 94 .678JK^1 mol−^1

3.21

Sst 14 .90JK−^1 mol−^1

3.22

∆vapHm16240 J mol−^1

Table A.7 value15646 J mol−^1

Chapter 3 Problems

3.1

a. η 0. 211

V 2  2. 52 L

V 4  0. 857 L

b. w 1 −1411 J

w 2 −312 J

w 3 1113 J

w 4 312 J

3.3

h 14 .1km

3.5

a. ηc 0. 2114

b. ηc 0. 4107

percentage improvement 94 .3%

c.m 1 .996 kg

3.7

a. q(house) 8. 4 × 107 J

b. q(house) 4. 68 × 108 J

c.q(house) 4. 00 × 107 J

3.11

a. ηc 0. 01649

b. dV/dt 1. 45 × 103 m^3 s−^1

3.13

a. ∆S 1  5 .7632 J K−^1

∆S 2  5 .7587 J K−^1

∆S 3 − 2 .3919 J K−^1

∆S 4 − 2 .9612 J K−^1

∆S 5 − 3 .3712 J K−^1

∆S 6 − 2 .7985 J K−^1

b. All values are the same

3.15

w−1227 J

q 0

∆U−1227 J

Tf 401 .6K

∆S 7 .278JK−^1

∆Srev 0

qrev 0

∆Urev−3441 J

wrev−3441 J

3.17

a. ∆S 217 .98JK−^1

b. ∆S 16 .54JK−^1

3.19

a. ∆S− 5 .7632 J K−^1

∆U 0

q− 1718 .3J

w 1718 .3J

∆Suniv 0

∆Ssurr 5 .7632 J K−^1

b. q 0

∆S 0

∆Ssurr 0

∆Suniv 0

T 2  473 .3K

∆U 2184 .4J

w 2184 .4J

c.T 2 > 473 .3K

∆U> 2184 .4K

w> 2184 .4K

q 0

∆S> 0

∆Ssurr 0

∆Suniv> 0

d. ∆S− 5 .7632 J K−^1

∆U 0

w<5066 J

q>−5066 J

∆Suniv> 0

∆Ssurr> 5 .7632 J K−^1

3.21

a. ∆S 23 .55JK−^1

b. ∆S 23 .55JK−^1

c.∆Ssurr− 23 .55JK−^1