Standard enthalpy of vapourisation `Delta_("vap")H^( )` for water at `100^@C` is `40.66 kJ mol^( 1)`. The internal energy of vapourisation of water at `100^@C` (in kJ `mol^( 1)`) is (Assume water vapour to behave like 5ml Delta 8 Disposable HHC THC Vape Pen 4asvapes Vaping Products Calculated and Experimental Enthalpies vap H and vap H exp of Download Table Delta 8 THC Disposable Vape Pineapple Express 3 Ways to Calculate Vapor Pressure wikiHow