A reaction at 1 bar is non-spontaneous at low temperature but becomes spontaneous at high temperature. Identify the correct statement about the reaction among the following:

Options

A. Both `DeltaH` and `DeltaS` are positive
B. `DeltaH` is negative while `DeltaS` is positive
C. `DeltaH` is positive while `DeltaS` is positive
D. Both `DeltaH` and `DeltaS` are negative

Answer

A

Explanation

`DeltaG = DeltaH - T. DeltaS`
If `DeltaH` & `Delta S` are both positive, then `DeltaG` may be negative at height temperature hence reaction becomes spontaneous at higher temperature.