Practice question
Question
The enthalpy of combustion of benzene is -3267.6 kJ/mol. What is the heat released when 39 g of benzene is burnt? (Molar mass = 78 g/mol)
Explanation
Moles = 39 / 78 = 0.5 mol, heat released = 0.5 × 3267.6 = 1633.8 kJ.
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