Kelvi

Consider the following liquid – vapour equilibrium: Liquid ⇌ Vapour. Which of the following relations is correct?

medium

Thermodynamics

2016

chemistry

$\frac{d lnG}{dT^2} = \frac{\Delta H_{vap}}{RT^2}$

$\frac{d ln P}{dT} = -\frac{\Delta H_{vap}}{RT}$

$\frac{d ln P}{dT^2} = -\frac{\Delta H_{vap}}{T^2}$

$\frac{dP}{dT} = \frac{\Delta H_{vap}}{RT^2}$

Explanation

To solve this problem, we will use the Clausius-Clapeyron equation, which describes the relation between the pressure and temperature of a substance in phase equilibrium. $\\$ The Clausius-Clapeyron equation is given by: $\\ \frac{d \ln P}{dT} = \frac{\Delta H_{vap}}{RT^2} \\$

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