Question

Standard free energy change for an equilibrium is zero, the value of $K_p$ is

• A. 0
• B. 1
• C. 2
• D. 100

Answer 1

Answer: (B)

Standard free energy change,
$\Delta G^o=-2.303RT\log K_p$ If $\Delta G^o=0$
$\Rightarrow$ $0=-2.303RT\log K_p\log K_p=0$
$\therefore K_p=1$