What is latent heat of vaporization and how does it relate to hydrous ethanol?
Also referred to as enthalpy of vaporization, (symbol ΔvH), the heat of vaporization or heat of evaporation, is the energy required to transform a given quantity of a substance, such as water and ethanol, into gaseous forms. It is measured at the normal boiling point of the substances. Enthalpy of vaporization can be viewed as the energy required for overcoming the intermolecular interactions in hydrous ethanol blends. The heat of vaporization values for the water and ethanol contained in hydrous ethanol blends (oxygenated hydrocarbons) are substantially higher than that for the hydrocarbon components of gasoline. The molecules in liquid water are held together by relatively strong hydrogen bonds, and its enthalpy of vaporization, 40.65 kJ/mol, is more than five times the energy required to heat the same quantity of water from 0 °C to 100 °C (cp = 75.3 J K−1 mol−1). When discussing latent heat of vaporization, it is important to understand the difference between latent heat and sensibl
