1.

If DeltaE is the heat of reaction for C_(2)H_(5)OH(l)+3O_(2)(g)to2CO_(2)(g)+3H_(2)O(l) at constant volume, the DeltaH (heat of reaction at constant pressure), at constant temperature is

Answer»

`DeltaH=DeltaE+RT`
`DeltaH=DeltaE-RT`
`DeltaH=DeltaE-2RT`
`DeltaH=DeltaE+2RT`

Solution :We KNOW that, `DeltaH=DeltaE+DeltanRT`
where, `DELTAN`=number of MOLES of gaeous products-number of moles of GASEOUS reactants=2-3=-1
so, `DeltaH=DeltaE-RT`


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