Gibbs free energy (F) is defined as

A. F = E - TS

B. F = H - TS

C. F = H + TS

D. F = E + TS

Answer: Option B

Solution(By Examveda Team)

Gibbs free energy :
\[\begin{array}{l} G = H - TS\\ \Rightarrow - dG = {W_R} - PdV \end{array}\]
So, it represents maximum useful work in a reversible process.