# What mass of natural gas (CH4) must you burn to emit 271kJ of heat? CH4(g)+2O2(g)-->CO2(g)+2H2O(l) Delta H rxn = -802.3 kJ

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Apr 7, 2015

1 mole of CH4 is 16 grams.

So if we know that for 802 kJ heat release 16 grams of methane is needed then we can find the amount of methane needed to be burnt for 271 kJ heat to be released:

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