1.

Calculate the heat of vaporisation of water per gm at 25^(@)C and 1 atm. Given DeltaH_(f)^(@)[H_(2)O(l)]=-285.5kJ//mol DeltaH_(f)^(@)[H_(2)O(g)]=-241.6kJ//mol Comment why DeltaH_("vap")(25^(@)C)gtDeltaH_("vap")(100^(@)C)

Answer»

SOLUTION :`DeltaH_("vap")(25^(@)C)=43.97kJ//mol=2.433kJ//gm,DeltaH_("vap")(100^(@)C)=40.62KJ//mol("given")`


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