Question

Which one of the following correctly represents the physical significance of Gibb's energy change?

• A. $-\Delta G=W_{\text{compression}}$
• B. $\Delta G=W_{\text{expansion}}$
• C. $\Delta G={-W}_{\text{expansion}}=W_{\text{non-expansion}}$
• D. $-\Delta G=W_{\text{expansion}}$

Answer 1

The correct option is D $-\Delta G=W_{\text{expansion}}$

The decrease in Gibbs energy results in useful work done by the system.

Therefore, $-\Delta G=W_{\text{expansion}}$ is the correct expression.