Compounds with carbon€“carbon double bonds, such as ethylene, C2H4, add hydrogen in a reaction called hydrogenation.
C2H4(g) + H2(g) †’ C2H6(g)
Calculate the enthalpy change for this reaction, using the following combustion data:
C2H4(g) + 3O2(g) †’ 2CO2(g) + 2H2O(l);
ˆ†H = €“1411 kJ

Transcribed Image Text:

C2H6(g) + 302(g)一2CO2(g) + 3H20(1); ΔΗ =-1560 kJ H2(g) +-O2(g)--H20(1): ΔΗ =-286 kJ