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In the reaction C + O2 -> CO2, if the heat liberated is 10 J, what is the heat of formation of CO2?

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In the reaction C + O2 -> CO2, if the heat liberated is 10 J, what is the heat of formation of CO2?

(a) -10 J

(b) 10 J

(c) 0

(d) Cannot be determined

I got this question in an online quiz.

Query is from Standard Heat (Enthalpy) of Formation topic in portion Application of Energy Balances in the Absence of Chemical Reactions and Energy Balances: How to Account for Chemical Reaction of Basic Chemical Engineering

1 Answer

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Best answer
Right answer is (a) -10 J

The explanation is: Heat of formation = -10 J.

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