1.

Calculate the heat of hydrogenation of C_(2)H_(4). If DeltaH_(f)(C_(2)H_(4))&DeltaH_(f)(C_(2)H_(6)) is x_(1) & x_(2) respectively:-

Answer»

`x_(1)+x_(2)`
`x_(1)-x_(2)`
`x_(2)-x_(1)`
`x_(1)+x_(2)`

Solution :`C_(2)H_(4)+H_(2) to C_(2)H_(6),DeltaH_(r)=DeltaH_(Hyd)`
`DeltaH_(r)=sumDeltaH_(f)(P)-sumDeltaH_(f)(R)`
`=x_(2)-x_(1)`.


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