NEET Solved Paper 2016 Question 27

Question: Consider the following liquid - vapour equilibrium. $ \text{Liquid }Vapour $ Which of the following relations is correct?

Options:

A) $ \frac{d\ell nG}{dT^{2}}=\frac{\Delta { _{v}}}{RT^{2}} $

B) $ \frac{d\ell nP}{dT}=\frac{-\Delta { _{v}}}{RT} $

C) $ \frac{d\ell nP}{dT^{2}}=\frac{-\Delta { _{v}}}{T^{2}} $

D) $ \frac{d\ell nP}{dT}=\frac{\Delta { _{v}}}{RT^{2}} $

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Answer:

Correct Answer: D

Solution:

  • Clausius - Clapeyron’s equation $ \frac{d,\ln P}{dT}=\frac{\Delta H _{v}}{RT^{2}} $