1.

The heat of reaction for C_(10)H_(8)(s)+12O_(2)(g)to 10CO_(2)(g)+4H_(2)O(l) at constant volume is -1228.2 kcal at 25^(@)C. The heat of reaction at constant pressure and same temperature is

Answer»

`-1228.2` kcal
`-1229.3` kcal
`-1232.9` kcal
`-1242.6` kcal

Solution :`C_(10)H_(8)(s)+12O_(2)(g) to 10CO_(2)(g)+4H_(2)O(l)`
We KNOW that, `DeltaH=DeltaE+Deltan_(g)RT`
`therefore DeltaH=-1228.2xx10^(3)+(-2)(2)(298)`
`=-1229392cal=-1229.392kcal`


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