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What is the sensible heat of a reaction if the enthalpy of outputs is 15 J, and enthalpy of inputs is 5 J?

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What is the sensible heat of a reaction if the enthalpy of outputs is 15 J, and enthalpy of inputs is 5 J?

(a) 3 J

(b) 5 J

(c) 10 J

(d) 15 J

This question was posed to me at a job interview.

This intriguing question originated from Energy Balances Application in Processes topic in section Energy Balances that Include the Effects of Chemical Reaction, Ideal Processes, Efficiency and the Mechanical Energy Balance and Heats of Solution and Mixing of Basic Chemical Engineering

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The correct choice is (c) 10 J

The best explanation: Q = ∆Houtput – ∆Hinput = 15 – 5 = 10 J.

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