When the temperature of a liquid is increased, the vapour pressure increases from to . How does the ratio vary with the enthalpy of vaporisation?
For a compound X, which enthalpy change is associated with the process ?
The normal boiling point of is 331.9 K, and its vapour pressure at 298 K is 0.287 bar. Within the approximations inherent to the Clausius-Clapeyron equation, what value of (the molar enthalpy of vaporisation) for would be compatible with this data?