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Chemistry HL Paper 1 (May 2024, TZ2)

  1. Standard enthalpy changes of reaction are provided for the following reactions.

C(s) + O₂(g) → CO₂(g) ΔH° = −394 kJ
H₂(g) + ½O₂(g) → H₂O(l) ΔH° = −286 kJ
C₂H₅OH(l) + 3O₂(g) → 2CO₂(g) + 3H₂O(l) ΔH° = −1367 kJ

What is the standard enthalpy change, in kJ, of the following reaction?

2C(s) + 3H₂(g) + ½O₂(g) → C₂H₅OH(l)