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For complete combustion of ethanol, C(2)...

For complete combustion of ethanol, `C_(2)H_(5)OH(l) + 3O_(2)(g) rarr 2CO_(2)(g) + 3H_(2)O (l)`, the amount of heat produced as measured in bomb calorimeter , is `1364.47 kJ mol^(-1)` at `25^(0)C`. Assuming ideality the Enthalpy of combustion, `Delta_(C)H`, for the reaction will be: `(R = 8.314 kJ mol^(-)`).

A

`-1366.95 KJ mol^(-1)`

B

`-1361.95KJ mol^(-1)`

C

`-1460.50 KJ mol^(-1)`

D

`-1350.50 KJ mol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
`C_(2)H_(5)OH(l)+3O_(2)(g)rarr 2CO_(2)(g)+ 3H_(2)O(l)`
`DeltaU =- 1364.47 KJ/mol`.
`DeltaH = DeltaU + Deltan_(g)RT`
`Deltan_(g)=-1`
`DeltaH=-1364.47 - 2.6.47 + [(-1xx8.314 xx 298)/(1000)]`
`=-1364.47 - 2.4776 =-1366.94 KJ//mol`.
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