The heats of combustion of `Ch_(4)` and `C_(4)H_(10)` are `-890.3` and `-2878.7 kJ mol^(-1)`, respectively. Which of the two has greater efficiency as fuel per gram?

The heats of combustion of `Ch_(4)` and `C_(4)H_(10)` are `-890.3` and

1.	The heats of combustion of `Ch_(4)` and `C_(4)H_(10)` are `-890.3` and `-2878.7 kJ mol^(-1)`, respectively. Which of the two has greater efficiency as fuel per gram?
Answer» Molar mass of methane `= 16` Heat produced per gram of methane `=- (890.3)/(16) =- 55.64 kJ` Molar mass of butane `= 58` Heat produced per gram of butane `=- (2878.7)/(58) =- 49.63 kJ` Thus, methane has greater fuel efficiency than butane.

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The heats of combustion of `Ch_(4)` and `C_(4)H_(10)` are `-890.3` and `-2878.7 kJ mol^(-1)`, respectively. Which of the two has greater efficiency as fuel per gram?

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