What is the heat of reaction if the heat of combustion of products is 25 J and h

Question

What is the heat of reaction if the heat of combustion of products is 25 J and heat of combustion of reactants is 15 J?

Options:

A . -5 J

B . 5 J

C . -10 J

D . 10 J

Answer: Option C
Answer: (c).-10 J

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