7. a) Find the AH for the reaction below, given the following reactions and subsequent AH values:

2C₂H₂O(l) + 2H₂O(1)→2C₂H6O(l) + O₂(g) ®H = ?

[3 marks]

C₂H5O(1) 302(g) → 2CO₂(g) + 3H₂O(l)

C₂H4O(1) + 5/202(g) → 2CO2(g) + 2H₂O(1)

ΔΗ = -685.5 kJ

AH = -583.5 kJ