1.

`DeltaU^(@)` of combustoin of methane is `-XKJ mol ^(-1)` The value of `DeltaH^(@)` is :-A. `-X-596R`B. `-X+596R`C. `X+596R`D. `X-596R`

Answer» Correct Answer - A
`CH_(4)(g)+2O(g)toCO_(2)(g)+2H_(2)(g)+2H_(2)O(l)`
`DeltaH^(@)=DeltaH^(@)=DeltaU^(@)+Deltan_(g)RT`
`DeltaH^(@)=-x+(-2)Rxx298`
`DeltaH^(@)=-x-596R`


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