Question

For spontaneous reaction, $\Delta G$ is:

• A. -ve
• B. +ve
• C. zero
• D. None of these

Answer 1

The correct option is A -ve

For a spontaneous reaction, the sign on $\Delta G$ must be negative.

Gibbs free energy relates enthalpy, entropy and temperature. A spontaneous reaction will always occur when $\Delta H$ is negative and $\Delta S$ is positive.

Hence, option A is correct.