Water Properties: Vaporization Heat vs. Temperature Charts and Calculator Standard Enthalpy of Formation, \(\Delta H_{\rm f}^\circ \) Correct relationship between heat of fusion `(DeltaH_(fus))`, heat of vaporization `(DeltaH_("vap"))` and heat of sublimation `(DeltaH_("sub"))` is thermodynamics $\Delta \bar{h}_{vap}$ and $\Delta \bar{s}_{vap}$ from vapor pressure vs. temperature data Chemistry Stack Exchange Heat of Vaporization from Vapor Pressure (Example)