Question

How much energy in kilocalories would combustion of 0.660 oz ounces of methane release?

I AM ALSO GIVEN THIS INFORMATION TO ANSWER THE QUESTION.

The combustion of 45.0 {g} of methane (natural gas) releases 2498 {kJ} of heat energy.

HOW CAN I DO IT?

Answers

0.660 oz of methane = 18.7 grams of methane

1 kcal = 4.186 kJ

18.7 g / x kJ = 45.0 g / 2498 kJ

x kJ = (18.7 g / 45.0 g) * 2498 kJ

x kcal = (18.7 g / 45.0g) * 2498 kJ * (1 kcal / 4.186 kJ)

x kcal = 248.12 kcal

Round to 3 significant digits:

248 kcal would be released by the combustion of 0.660 oz of methane (or CH4).

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