`DeltaG` is the net energy available to do useful work and is a measure of free energy. If a reaction has positive enthalpy change and positive entropy change, under what conditions will the reaction be spontaneous?A. `DeltaG` will be positive at low temperature hence reaction is spontaneous at low temperature.B. `DeltaG` is negative at high temperature hence reaction is spontaneous at high temperature.C. `DeltaG` is negative at low temperature hence.D. `DeltaG` is negative at all temperature hence reaction is spontaneous at all temperatures.

`DeltaG` is the net energy available to do useful work and is a measur

1.	`DeltaG` is the net energy available to do useful work and is a measure of free energy. If a reaction has positive enthalpy change and positive entropy change, under what conditions will the reaction be spontaneous?A. `DeltaG` will be positive at low temperature hence reaction is spontaneous at low temperature.B. `DeltaG` is negative at high temperature hence reaction is spontaneous at high temperature.C. `DeltaG` is negative at low temperature hence.D. `DeltaG` is negative at all temperature hence reaction is spontaneous at all temperatures.
Answer» Correct Answer - B `DeltaG=DeltaH-T DeltaS` For a spontaneous reaction if `DeltaH` is +ve and `DeltaS=+ve,DeltaG` will be negative when `T DeltaS gt DeltaH`.

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