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The propane fuel (C3H8) used in gas barbeques burns according to a thermochemical equation. If a pork roast must absorb 1.6 * 103 kJ to fully cook, and if only 10% of the heat produced by the barbeque is actually absorbed by the roast, what mass of CO2 is emitted into the atmosphere during the grilling of the pork roast?

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aaregbe

Answer:

1033 g

Explanation:

The amount of heat energy required to roast the pork = 10*1600 kJ = 16000 kJ.

Using the change in enthalpy of the reaction given in the question and the balanced chemical equation:

3 moles of carbon dioxide is equivalent to -2044 kJ. 1 mole of carbon dioxide is equivalent to 44 g. Thus:

The mass of carbon dioxide emitted is:

[tex]m_{CO_{2} } = 16000 kJ*\frac{3 mol }{2044 kJ}*\frac{44 g}{1 mol} =  1033 g[/tex]

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