Determine the enthalpy of
reaction for 2CH2(g) → C₂H4(g)
+ 2H₂(g) using the equations:
2C₂H6(g) +70₂(g) → 4CO₂(g) +
6H₂O(1) AH° = -3120.8 kJ/mol
CH₂(g) +20₂(g) → CO₂(g) +
2H₂O(1) AH° = -890.3 kJ/mol
C₂H4(g) + H₂(g) → C₂H6(g) AH°
= -136.3 kJ/mol
H₂ + 1/2O₂(g) → H₂O(1) AH° =-285.8 kJ/mol