Given the following data:
2C2H6 (g) + 7O2 (g) ------> 4CO2 (g) + 6H2 (g) ΔH= -3120kJ
C (s) + O2 (g) -----> CO2 (g) ΔH= -394kJ
2H2 (g) + O2 (g) -----> 2H2O (l) ΔH= -572kJ
Use Hess’s law to calculate ΔH for the reaction: 2C(s) + 3H2 (g) -----> C2H6 (g)
ΔH= Answer.................. kJ
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