1.

Heat of formations of A, B, C, and D, are 3 J, 5 J, 4 J, and 8 J respectively, what is the heat of reaction 2A + 2B -> 2C + D?(a) -5 J(b) 0(c) 5 J(d) 8 J

Answer» Right option is (b) 0

The explanation: Heat of reaction = 8 + 2*4 – 2*5 – 2*3 = 0.


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