Equilibrium - Result Question 23
####24. Consider the following liquid - vapour equilibrium.
[2016] Liquid $\rightarrow$ Vapour
Which of the following relations is correct ?
(a) $\frac{d \ell nG}{dT^{2}}=\frac{\Delta H_v}{RT^{2}}$
(b) $\frac{d \ell nP}{dT}=\frac{\Delta H_v}{RT}$
(c) $\frac{d \ell nP}{dT^{2}}=\frac{-\Delta H_v}{T^{2}}$
(d) $\frac{d \ell nP}{dT}=\frac{-\Delta H_v}{RT^{2}}$
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Solution:
- (d) Clausius-Clapeyron’s equation
$\frac{d \ln P}{dT}=\frac{\Delta H_v}{RT^{2}}$
