Heat of formations of A, B, C, and D, are 2 J, 5 J, 3 J, and 10 J resp – McqOptions

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1.	Heat of formations of A, B, C, and D, are 2 J, 5 J, 3 J, and 10 J respectively, what is the heat of reaction 4A + 5B -> 2C + 2D?
A.	-10 J
B.	-7 J
C.	-5 J
D.	0
Answer» C. -5 J

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