c06 JWBS043-Rogers September 13, 2010 11:25 Printer Name: Yet to Come
92 THE GIBBS FREE ENERGYTCp
15.0000 6.9000
20.0000 12.0000
29.8000 20.8000
42.2000 29.1000
57.5000 35.6000
75.5000 40.0000
89.4000 43.1000
99.0000 45.9000
108.9000 48.5000
119.9000 50.5000
131.5000 52.6000
145.0000 54.3000
157.0000 56.6000
161.0000 57.4000Problem 6.8
The enthalpy of fusion of CS 2 (s) to liquid carbon disulfide CS 2 (l) is 4.38 kJ mol−^1
Pitzer et al. 1961. What is the entropy of fusion of CS 2 (s) at its normal melting point
of 161 K?Problem 6.9
The heat capacity at constant pressure of liquid CS 2 (l) is nearly constant at 75.5
JK−^1 mol−^1. What is the molar entropy increase of CS 2 (l) from 161 K to 298 K?Problem 6.10
Find the standard molar entropy of carbon disulfide at 298 K.Problem 6.11
The Gibbs free energies of combustion of methane at 300K and 350 K are
−815 and−802 kJ mol−^1. Find the enthalpy of combustion of methane at 325 K
cH^325 (methane).Problem 6.12
Solve the previous problem by setting up a pair of simultaneous equations and solving
them.