Question

Which of the following statements regarding Gibb's energy change is correct?

• A. If $\Delta$G is negative (< 0), the process is non-spontaneous.
• B. If $\Delta$G is positive (> 0), the process is non-spontaneous.
• C. If $\Delta$G is negative (< 0), the process is spontaneous.
• D. If $\Delta$G is positive (> 0), the process is equilibrium.

Answer 1

The correct option is C If $\Delta$G is negative (< 0), the process is spontaneous.

The energy available for a system at some conditions and by which useful work can be done is Gibb's energy (G).

$G=H-TS$

For spontaneous process, $\Delta G<0$

For non-spontaneous process, $\Delta G>0$

For equilibrium process, $\Delta G=0$