What mass of natural gas CH4 must you burn to emit 273 kJ of heat?
What mass of methane (CH₄) must be burned to release 273 kJ of heat? The combustion reaction is as follows:
CH₄ + 2O₂ → CO₂(g) + 2H₂O(g)
ΔH(reaction) = -802.3 kJ
2 Answers
1 mole of CH4 produces -802.3 kJ.
-273 kJ produces by -273 kJ/ -802.3 kJ = 0.3403 mole CH4
Molar mass of CH4 = (1x4) + 12 = 16 g/mole
Mass of CH4 = Molar mass x moles
= 16 x 0.3403 mole = 5.44 g CH4Related Questions
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