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For endothermic reactions, what is the heat of reaction?

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in Basic Chemical Engineering by (74.6k points)
For endothermic reactions, what is the heat of reaction?

(a) Positive

(b) Negative

(c) Zero

(d) Cannot Say

The question was asked during a job interview.

My doubt stems from Standard Heat (Enthalpy) of Formation 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
The correct answer is (a) Positive

Best explanation: In endothermic reactions, heat comes into the system, so the heat of reaction is positive.

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