Heat Of Vaporization Formula

Equation for calculate heat of vaporization is,

ΔHvap= (R* ln(p2/p1 ))/((1/T1)-(1/T2))

Where,
T1 - Initial Temperature
T2 - Final Temperature
p1 - Vapour pressure at initial temperature
p2 - Vapour pressure at final temperature
R - Gas constant (8.31447