The relationship between vapour pressure,vaporization enthalpy,and enthalpy of transfer from solution to gas: An extension of the Martin equation

Martin’s equation, ${\mathrm{\Delta }}_{\text{sln}}^{\text{g}}G={\mathrm{\Delta }}_{\text{sln}}^{\text{g}}{G}_{\text{o}}+z{\delta }_{\text{sln}}^{\text{g}}G$, is extended to cover vaporization free energy $({\mathrm{\Delta }}_{\text{l}}^{\text{g}}G)$. The extended equation is further expanded in terms of enthalpy and entropy and then used to correlate vaporization enthalpy $({\mathrm{\Delta }}_{\text{l}}^{\text{g}}H)$ and enthalpy of transfer from solution to gas $({\mathrm{\Delta }}_{\text{sln}}^{\text{g}}H)$. Data available in the literatures are used to validate and support the speculations derived from the proposed equation.