Practice question
Question
The enthalpy of combustion of methane is -890 kJ/mol. What is the heat released when 8 g of methane is burnt? (Molar mass of CH₄ = 16 g/mol)
Explanation
Moles of CH₄ = 8 / 16 = 0.5 mol. Heat released = 0.5 × 890 = 445 kJ.
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