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

Answer 1

Answer: (C)

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, $\Delta G =0$