The value of enthalpy change(DeltaH ) for the reactionC_(2)H_(5)OH(l) +3O_(2)(g)rarr 2CO_(2)(g) +3H_(2)O(l) at 27^(@)C is -1366 kJ mol^(-1). The value of internal energy change for the above reaction at thistemperature will be

The value of enthalpy change(DeltaH ) for the reactionC_(2)H_(5)OH(l)

1.	The value of enthalpy change(DeltaH ) for the reactionC_(2)H_(5)OH(l) +3O_(2)(g)rarr 2CO_(2)(g) +3H_(2)O(l) at 27^(@)C is -1366 kJ mol^(-1). The value of internal energy change for the above reaction at thistemperature will be
Answer» `-1371.5 kJ ` `-1369.0 kJ ` `- 1364.0 kJ` `-1361.5kJ ` Solution :`C_(2)H_(5)OH(l) + 3O_(2)(g) rarr2CO_(2)(g) + 3H_(2)O(l)`,` Deltan_(g)=2-3= -1` `DeltaU = DeltaH -Deltan_(g)RT` `= - 1366.5 kJ mol^(-1) - ( -1) XX 8.314 xx 10^(-3) kJ K^(-1)mol^(-1) xx 300K` `= - 1366.5 + 0.8314 xx 3 kJ mol^(-1)` `=- 1366.5 +2.4942 = - 1364kJ mol^(-1)`