Question

equation that correlates temperature and vapour pressure change is called?​

Answer 1

Answer: The equation is known as Clapeyron Equation.

Explanation:

There is a direct relationship between the vapor pressure and temperature. On raising the temperature, more and more number of molecules of a liquids will have energies greater than the critical energy which is required to overcome the forces of attraction between the molecules.

The equation for the relation between change in vapor pressure with temperature is given by Clapeyron equation, which is:

$\frac{dp}{dT}=\frac{\Delta_{vap}H}{T(V_{m,v}-V_{m,l})}$

where,

$\frac{dp}{dT}$ = rate of change of vapor pressure with temperature

$\Delta_{vap}H$ = molar enthalpy of vaporization of liquid

$V_{m,v}\text{ and }V_{m,l}$ = molar volumes of vapor and liquid

T = temperature

The vapor pressure of a liquid increases with increase in temperature.