Answer:
8.60 x 10⁴ kJ
Explanation:
The energy released per gram of methane is first calculated:
(2498kJ)/(45.0g) = 55.5 kJ/g
The heat released by the combustion of 1.55 kg of methane is then calculated:
(55.5kJ/g)(1.55kg)(1000g/kg) = 86025kJ
To three significant digits, the answer is 8.60 x 10⁴ kJ.
