Question Detail
Question
For the reaction: 2H₂(g) + O₂(g) → 2H₂O(l), 571.6 kJ of heat is released. How much heat is released when 4.0 g of H₂ is burned in excess oxygen?
Correct Answer
Option A is the correct answer.
Detailed Explanation
The reaction shows 2 mol H₂ (4.0 g) produces 571.6 kJ. 4.0 g H₂ = 2 mol (since molar mass H₂ = 2 g/mol). Thus, heat released = 571.6 kJ.
Hint
Relate the heat released to the moles of reactant used.