1.

What is the heat of reaction for CH4 + 2O2 -> CO2 + 2H2O, if the heat of combustion of H2O = 5 J, CO2 = 10 J, O2 = 0, and CH4 = 25 J?$

A. -5 J
B. 5 J
C. -10 J
D. 10 J
Answer» C. -10 J


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