The enthalpy of vaporisation of "CC"I(4)...

The enthalpy of vaporisation of `"CC"I_(4)` is 30.5 kJ mol`""^(-1)`. Calculate the heat required for the vaporisation of 284 g of `"CC"I_(4)` at constant pressure. (Molar mass of `"CC"I_(4) = 154 "g mol"^(-1)` ).

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`1 "mol of CCI"_(4) = 154 g`
`Delta_("vap")` H for `154 g "CCI"_(4) = 30.5 "kJ"`
`therefore Delta_("vap")` H for `284 g "CCI"_(4) = (30.5 xx 284)/( 154) "kJ"`
`= 56.25 "kJ"`

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