Anonymous
Anonymous asked in Science & MathematicsChemistry · 4 weeks ago

chem question?

How many kilojoules of energy are produced by the combustion of 5.0 lbs of propane. The heat of combustion of propane is -49.89 kJ/g.

2 Answers

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  • 4 weeks ago

    (49.89 x 10^3 kJ/kg) x (5.0 lbs / (2.20462 lbs/kg)) = 113149 kJ = 1.1 x 10^5 kJ

  • 4 weeks ago

    5 lbs = 2268 g

    49.89 kJ/g x 2268 g = 113148 kJ rounded to 113 MJ

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