How much heat is released when 2 moles of CH₄ are burned? (Standard enthalpy of combustion of CH₄ = -890 kJ/mol)

  1. 445 kJ
  2. 890 kJ
  3. 1780 kJ
  4. 2670 kJ

📝 Batafsil tushuntirish

Heat released = moles * |ΔH_comb|. Heat = 2 mol * 890 kJ/mol = 1780 kJ.
12 / 50 (24%)
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