1.

Heat of formations of A, B, C, and D, are 5 J, 8 J, 2 J, and 15 J respectively, what is the heat of reaction 3A + B -> 3C + 2D?(a) 9 J(b) 10 J(c) 13 J(d) 15 J

Answer» Right choice is (c) 13 J

For explanation: Heat of reaction = 2*15 + 3*2 – 8 – 3*5 = 13 J.


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