If Delta H_(vaporisation) of substance X (l) (molar mass : 30 g mol) is 300 J g at it\'s boling Solved Hvap = heat of vaporization = constant R= gas Chegg.com What is `Delta U` when `2.0` mole of liquid water vaporises at `100^(@)C`? The heat of vaporisation `(Delta H_("vap".))` of water at `100^(@)C` is `40.66 KJmol^( 1)`. Properties of Liquids
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