10.10: Enthalpy of Fusion and Enthalpy of Vaporization Chemistry LibreTexts The internal energy change (in J) when 90 g of water undergoes complete evaporation at `100^(@)C ` is ______ . (Given : `Delta H_("vap")` for water at 373 K = 41 kJ mol , `R = 8.314 JK^( 1) mol^( 1)`) Enthalpy of vaporization Wikipedia Delta 8 1000mg Disposable White Widow Hemplitude Water Properties: Vaporization Heat vs. Temperature Charts and Calculator