Year: 2016

Topic: Chemical Thermodynamics

Time :

1.

Consider the following liquid - vapour equilibrium
Liquid \(\rightleftharpoons\) Vapour
Which of the following relations is correct ?

(1). \(\displaystyle \frac{\text{dlnP}}{\text{dT}}\) = \(\displaystyle \frac{- \Delta text{H}_v}{\text{RT}}\)
(2). \(\displaystyle \frac{\text{dlnP}}{\text{dT}^2}\) = \(\displaystyle \frac{- \Delta text{H}_v}{\text{T}^2}\)
(3). \(\displaystyle \frac{\text{dlnP}}{\text{dT}}\) = \(\displaystyle \frac{- \Delta text{H}_v}{\text{RT}^2}\)
(4). \(\displaystyle \frac{\text{dlnG}}{\text{dT}^2}\) = \(\displaystyle \frac{- \Delta text{H}_v}{\text{RT}^2}\)

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