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In the reaction 2N -> N2, if the heat liberated is 6 J, what is the heat of formation of N2?

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In the reaction 2N -> N2, if the heat liberated is 6 J, what is the heat of formation of N2?

(a) – 6 J

(b) 6 J

(c) 0

(d) Cannot be determined

The question was posed to me in an internship interview.

My query is from Standard Heat (Enthalpy) of Formation in chapter 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
The correct choice is (a) – 6 J

To elaborate: Heat of formation = -6 J.

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