Question

An endothermic reaction is found to have $+ve$ entropy change. The reaction will be

• A. possible at high temperature
• B. possible only at low temperature
• C. not possible at any temperature
• D. possible at any temperature.

Answer 1

Answer: (A)

possible at high temperature

Answer 2

Given, $\Delta S = { + ve}$ and $\Delta H = {+ve}$
Now, $\Delta G = \Delta H - T \Delta S$
For a reaction to be spontaneous, $\Delta G$ should be -ve, which is possible only at high temperature i.e. when $T\Delta S > \Delta H$