Engineering
Chemistry
Enthalpy of Formation Combustion and Bond
Born Haber Cycle
Question

Enthalpy diagram for combustion of 1 mol of methane is given as :

Determine enthalpy of combustion of CH4

– 802 kJ/mol

– 88 kJ/mol

+ 890 kJ/mol

– 890 kJ/mol

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Solution

CH4 + 2O2 → CO2 + 2H2O(ℓ)
ΔHcomb. = – 890 kJ/mol 

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