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For complete combustion of ethaol, C(2...

For complete combustion of ethaol,
`C_(2)H_(5)OH(l)+3O_(2)(g)to2CO_(2)(g)+3H_(2)O(L)`
the amount of heat produced as measured in bomb calorimeter, is 1364.47 kJ `mol^(-1)` at `25^(@)C`. Assuming ideality the enthalpy of combustion, `Delta_(c)H`, for the reaction will be `(R=8.314kJmol^(-1))`

A

`−1366.95kJ mol^(−1)`

B

`−1361.95kJ mol^(−1)`

C

`−1460.50kJ mol^(−1)`

D

`−1350.50kJ mol^(−1)`

Text Solution

Verified by Experts

The correct Answer is:
A
`C_2H_5OH(l) + 3O_2(g) to 2CO_2(g) + 3H_2O(l)`
`DeltaU = -1364.47 KJ//mol`
`DeltaH = DeltaU + Deltan_gRT`
`Deltan_g = -1`
`DeltaH = -1364.47 + [(-1 xx 8.314 xx 298)/(1000)]`
` = -1364.47 - 2.4776`
` = -1366.94 KJ //mol`.
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