Study the reactions for the formation of compounds from their elements.
AH = -394 kJ
1. C(s) + O2 (g) → CO₂ (g)
2. H₂ (g) + O2(g) → H₂O (1)
3. 2C (s) + 3H2 (g) → C₂H6 (9)
ΔΗ = -242 kJ
AH = -84 kJ
The combustion of C₂H6 is shown by the following equation:
C₂H6 (9) + O2 (g) → 2CO₂ (9) + 3H₂O (1)
AHc = ?