1.

What is the heat of reaction for H2 + Cl2 -> 2HCl, if the heat of combustion of H2 = 2 J, Cl2 = 10 J, and HCl = 10 J?(a) -8 J(b) 8 J(c) -10 J(d) 10 J

Answer» Correct choice is (a) -8 J

The best I can explain: Heat of reaction = 10 + 2 – 2*10 = -8 J.


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