The change in Gibbs free energy of the system alone provides a criterion for the spontaneity of a process at constant temperature and pressure. A change in the free energy of a system at constant temperature and pressure will be :
`DeltaG_("system")=DeltaH_("system")-T DeltaS_(system")`
For a system in equilibrium, `DeltaG=0`, under conditions of contant....
A. Temperature and pressure
B. Temperature and volume
C. Pressure and volume
D. Energy and volume
