Physical Chemistry Third Edition

K Answers to Numerical Exercises and Odd-Numbered Numerical Problems 1315

d. ∆S 23 .55JK−^1

∆Ssurr− 18 .71JK−^1

∆Suniv 4 .84JK−^1

3.23

a. T 2  271 .4K

q 0

∆U−5702 J

w−5702 J

∆S 0

∆Suniv 0

b. T 2  439 .1K

∆S 0

w−1520 J

q−4183 J

∆U−5703 J

∆Suniv 12 .00JK−^1

3.25
∆S 18 .71JK−^1

3.27

a. Sst 14 .898JK−^1

b. Sst 11 .526JK−^1

3.29

Sst 3. 7154 × 10 −^21 JK−^1.

3.31

∆Smix 5 .763JK−^1

3.33

Sm◦(CO 2 ) 30 .00JK−^1 mol−^1

Sm◦(H 2 O)40.00 J K−^1 mol−^1

3.35

a. ∆S◦ 100 .97JK−^1 mol−^1

b. ∆S◦− 169 .4JK−^1 mol−^1

c. ∆S◦− 232 .72JK−^1 mol−^1

d. ∆S◦ 1330 .0JK−^1 mol−^1

3.37

a. Sm,473K◦  204 .9JK−^1 mol−^1

b. S◦m,473K 204 .7JK−^1 mol−^1

3.39

a. ∆fS◦(CO)89.340 J K−^1 mol−^1

∆fS◦(CO 2 ) 2 .908JK−^1 mol−^1

∆fS◦(O 2 ) 0

b. ∆S◦− 172 .864JK−^1 mol−^1

3.41

Sm◦(270 K) 39 .99JK−^1 mol−^1

3.43

∆S/Jk−^1 mol−^1

ammonia 97. 44

benzene 121. 47

carbon 82. 72

monoxide

carbon 91. 27

tetrachloride

ethane 84. 80

ethanol 115. 12

methane 81. 57

water 108. 99

3.47

∆S− 145 .11JK−^1

∆H 44 .004 kJ−^1

qsurr 44 .004 kJ

3.49

a. q− 1. 225 × 105 kJ

b. h 7 .08 km

c. h 6 .03 km

3.51

a. FALSE

b. FALSE

c.TRUE

d. FALSE

e.FALSE

f. TRUE

g. TRUE

h. FALSE

3.53

a. ∆Smix 9 .351JK−^1

b. five types of molecules

n(C^35 Cl 4 ) 0 .316406 mol

n(C^35 Cl^373 Cl)0.421876 mol

n(C^35 Cl^372 Cl 2 ) 0 .210936 mol

n(C^35 Cl^37 Cl 3 ) 0 .046875 mol

n(C^37 Cl 4 ) 0 .003906 mol

c.∆Smix 10 .157JK−^1