The free energy change, DG, for a process at constant temperature and pressure is
Chapter 17, Problem 17.22(choose chapter or problem)
The free energy change, DG, for a process at constant temperature and pressure is related to DSuniv and reflects the spontaneity of the process. How is DG related to DSuniv? When is a process spontaneous? Nonspontaneous? At equilibrium? DG is a composite term composed of DH, T, and DS. What is the DG equation? Give the four possible sign combinations for DH and DS. What temperatures are required for each sign combination to yield a spontaneous process? If DG is positive, what does it say about the reverse process? How does the DG 5 DH 2 TDS equation reduce when at the meltingpoint temperature of a solid-to-liquid phase change or at the boiling-point temperature of a liquid-to-gas phase change? What is the sign of DG for the solid-to-liquid phase change at temperatures above the freezing point?What is the sign of DG for the liquid-to-gas phase change at temperatures below the boiling point?
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