1.

During complete combustion of one mole of butane, 2658 kJ of heat is released.The termochemical reaction for above change is

Answer»

`2C_(4)H_(10)(g) + 13O_(2)(g) to 8CO_(2)(g) + 10H_(2)O(l)`,
` Delta_(c)H = -2658.0 kJ"mol"^(-1)`
`C_(4)H_(10)(g) + 13/2O_(2)(g) to 4CO_(2)(g) + 5H_(2)O(g)`
`Delta_(c)H = -1329.0 kJ"mol"^(-1)`
`C_(4)H_(10)(g) + 13/2 O_(2)(g) to 4CO_(2)(g) + 5H_(2)O(l)`
`Delta_(c)H = -2658.0 kJ"mol"^(-1)`
`C_(4)H_(10)(g) + 13/2O_(2)(g) to 4CO_(2)(g) + 5H_(2)O(l)`
`Delta_(c)H = + 2658.0 kJ"mol"^(-1)`

ANSWER :C


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