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What mass of natural gas (CH4) must you burn to emit 264 kJ of heat?

CH4(g)+2O2(g)→CO2(g)+2H2O(g)ΔH∘rxn=−802.3kJ

Verified Answer :

Edufirst

The heat released by cpmolete the combustion of organic products with oxygen is called heat of combustion.

Here 1 mol of CH4 realesed 802.3 KJ

To emit 264 kJ you multiply you need (1 mol of CH4/802.3 kJ) 264 kJ = 0.329 mol of CH4

The molar mass, MM, of CH4 is 12 g/mol + 41g/mol = 16 g/mol

The to obtain the mass multiply the number of moles times the molar mass:

mass = n MM = 0.329mol 16g/mol = 5.26 grams

Answer: 5.26 grams



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