The enthalpy of formation of `C_(2)H_(5)OH(l)` is `-66 k Cal//mol`. The enthalpy of combustion of `CH_(3)-O-CH_(3)` is `-348 k Cal//mol`. Given that the enthalpies of formation of `CO_(2)(g)` and `H_(2)O(l)` are `-94 k Cal//mol` & `-68 k Cal//mol` respectively, calculate `Delta H` for the isomerisation of ethanol to methoxymethane. All data are all `25^(@)C`.

Answer

`22" kCal mol"^(-1)`

Explanation

`C_(2)H_(5)OH rarr CH_(3)COCH_(3)`
`DeltaH=66+348-188-204=22" kCal mol"^(-1)`