1.

What is the heat of reaction for C2H4 + 3O2 -> 2CO2 + 2H2O, if heat of formation of C2H4, O2, CO2, and H2O are 10 J, 5 J, 6 J and 2 J respectively?

A. t-4 J
B. t-2 J
C. t0
D. t4 J
Answer» B. t-2 J


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