Question Detail
Question
What is the enthalpy of reaction for C₂H₄ + 3O₂ → 2CO₂ + 2H₂O, if the heat of formation of C₂H₄, O₂, CO₂, and H₂O are 10 J, 0, 6 J and 4 J?
Correct Answer
Option D is the correct answer.
Detailed Explanation
ΔH_rxn = Σ ΔH_f(products) - Σ ΔH_f(reactants) = [2×6 + 2×4] - [10 + 3×0] = [12+8] - [10] = 20 - 10 = 10 J. The options may have a typo; 10 J is correct based on given numbers.
Hint
Use ΔH_rxn = Σ ΔH_f(products) - Σ ΔH_f(reactants).