1.

Heat of formations of A, B, C, and D, are 1 J, 2 J, 3 J, and 4 J respectively, what is the heat of reaction 3A + 4B -> 2C + D?(a) -1 J(b) 1 J(c) 3 J(d) 6 J

Answer» Correct answer is (a) -1 J

Explanation: Heat of reaction = 4 + 2*3 – 4*2 – 3*1 = -1 J.


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