Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Search any question & find its solution
Question: Answered & Verified by Expert
The standard Gibbs free energy change $\Delta G^{\prime}$ is related to equilibrium constant $K_p$ as
ChemistryThermodynamics (C)JEE Main
Options:
  • A $K_p=-R T \ln \Delta G^{\circ}$
  • B $K_p=\left(\frac{e}{R T}\right)^{\Delta G^e}$
  • C $K_p=-\frac{\Delta G^o}{R T}$
  • D $K_p=e^{-\frac{\Delta G^T}{R T}}$
Solution:
1771 Upvotes Verified Answer
The correct answer is: $K_p=e^{-\frac{\Delta G^T}{R T}}$
$K_p=e^{-\frac{\Delta C^T}{R T}}$
For equilibrium condition $\Delta \mathrm{G}=0$
So,
$0=\Delta G^{\mathrm{a}}+R T \ln K_p$
$\ln K_{\mathrm{p}}=-\Delta G^{\circ} / R T$
Now
$K_p=e^{-\frac{\Delta G^T}{R T}}$

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.