Question

Identify the correct statement for change of Gibbs energy for a system ($\Delta G_{system}$) at constant temperature and pressure :

• A. If $\Delta G_{system} > \,0$, the process is spontaneous
• B. If $\Delta G_{\text{system}} = 0$, the system has attained equilibrium
• C. If $\Delta G_{\text{system}} = 0$, the system is still moving in a particular direction
• D. If $\Delta G_{\text{system}} <\, 0$, the process is not spontaneous

Answer 1

Answer: (B)

If$ \Delta G$ system < 0, the process is spontaneous

If $\Delta G $ system > 0, the process is nonspontaneous

If $ \Delta G$ system = 0, the process is in equilibrium