A reaction occurs spontaneously if:

Options

A. `TDeltaS lt DeltaH` and both `DeltaH` and `DeltaS` are `+ve`
B. `TDeltaS gt DeltaH` and both `DeltaH` and `DeltaS` are `+ve`
C. `TDeltaS = DeltaH` and both `DeltaH` and `DeltaS` are `+ve`
D. `TDeltaS lt DeltaH` and `DeltaH` is `+ve` and `DeltaS` is `-ve`

Answer

B

Explanation

`DeltaG=DeltaH-TDeltaS`
When both `DeltaH` and `DeltaS` are `+ve`, for reaction to be spontaneous `(DeltaG lt0)`, `TDeltaS gt DeltaH` (When `DeltaH` is `+ve` and `DeltaS` is `-ve`, the reaction in never spontaneous)