1.

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^(@)C. Assuming ideality the enthalpy of comustion, Delta_(c)H for the reaction will be (R = 8.314 kJ mol^(-1))

Answer»

`- 1366.95 kJ mol^(-1)`
`- 1361.95 kJ mol^(-1)`
`- 1460.50 kJ mol^(-1)`
`- 1350.50 kJ mol^(-1)`

Solution :`C_(2)H_(5)OH(l) + 3O_(2)(G) rarr 2CO_(2)(g) + 3H_(2)O(l)`
`Delta n_(g) = 2 - 3 = - 1`
:. `Delta H = - 1364.47 + (1) xx 8.314 xx 10^(-3) xx 298`
`= - 1366.93 kJ mol^(-1)`


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