How much heat is released when 2 moles of CH₄ are burned? (Standard enthalpy of combustion of CH₄ = -890 kJ/mol)
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445 kJ
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890 kJ
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1780 kJ
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2670 kJ
📝 Detailed explanation
Heat released = moles * |ΔH_comb|. Heat = 2 mol * 890 kJ/mol = 1780 kJ.
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