19. Chemical Thermodynamics
Gibbs Free Energy
19. Chemical Thermodynamics Gibbs Free Energy
67PRACTICE PROBLEM
The available thermodynamic data of phosphorus trichloride (PCl3) at 298 K are given below:
ΔH° (kJ/mol) ΔG° (kJ/mol)
PCl3(l) –319.7 –272.3
PCl3(g) –287.0 –267.8
Determine the ΔS° at 298 K for the vaporization of PCl3(l) using the given data. Is the sign of ΔS° as you would expect for vaporization?
The available thermodynamic data of phosphorus trichloride (PCl3) at 298 K are given below:
ΔH° (kJ/mol) ΔG° (kJ/mol)
PCl3(l) –319.7 –272.3
PCl3(g) –287.0 –267.8
Determine the ΔS° at 298 K for the vaporization of PCl3(l) using the given data. Is the sign of ΔS° as you would expect for vaporization?