1.

For complete combustion of ethanol, C_(2) H_(5) OH_((l)) + 3O_(2(g)) to 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 combustion, Delta_(C) H, for the reaction will be : (R= 8.314 "kJ mol"^(-1) )

Answer»

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

Solution :`C_(2) H_(5) OH_((l)) + 3O_(2(G)) to 2CO_(2(g)) + 3H_(2) O_((l))`
`Delta U = - 1364.47 "kJ mol"^(-1)`
`Deltan_(g) = -1`
`DeltaH = Delta U + Deltan_(g) RT`
`= -1364.47 - (1xx 8.314 xx 298)/( 1000)`
`=-1366.93 "kJ mol"^(-1)`


Discussion

No Comment Found