The change in Gibbs free energy `(DeltaG)` of the system along 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")-TDeltaS_("system")` At constant temperature and pressure: `DeltaG_("system")lt0` (Spontaneous) `DeltaG_("system")=0` (equilibrium) `DeltaG_("system")gt0` (non-spontaneous) Free energy is related to the equilibrium constant as: `DeltaG^(@)=2.303RTlog_(10)K_(e)`. Q. A reaction has positive values of `DeltaH and DeltaS`. From this you can deduce that the reaction:A. must be spontaneous at any temperature.B. cannot be spontaneous at any temperature.C. Will be spontaneous only at low temperatureD. will be spontaneous only at high temperature.

The change in Gibbs free energy `(DeltaG)` of the system along provide

1.	The change in Gibbs free energy `(DeltaG)` of the system along 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")-TDeltaS_("system")` At constant temperature and pressure: `DeltaG_("system")lt0` (Spontaneous) `DeltaG_("system")=0` (equilibrium) `DeltaG_("system")gt0` (non-spontaneous) Free energy is related to the equilibrium constant as: `DeltaG^(@)=2.303RTlog_(10)K_(e)`. Q. A reaction has positive values of `DeltaH and DeltaS`. From this you can deduce that the reaction:A. must be spontaneous at any temperature.B. cannot be spontaneous at any temperature.C. Will be spontaneous only at low temperatureD. will be spontaneous only at high temperature.
Answer» Correct Answer - D

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