Given the following information, calculate the enthalpy of this reaction 2C(graphite) + H2(g) →C2H2(g) AH=? (1) C(graphite) + O2(g) → CO2(g) (2) 1/202(g) + H2(g) → H2O(1) - (3) C2H2(g) +5/202(g) → 2002(g) + H2O(1) AH° -393.5 kJ = AH° -285.8 kJ = AH° -1299 kJ a. 512 kJ b. -512 kJ C. 1014 kJ 226 kJ e. -227 kJ