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What is the heat transferred to the system if the enthalpy of the output is 14 J and input is 8 J?

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What is the heat transferred to the system if the enthalpy of the output is 14 J and input is 8 J?

(a) 4 J

(b) 6 J

(c) 8 J

(d) 10 J

I got this question during an internship interview.

I'd like to ask this question from Merging Heat of Formation with Sensible Heat of Compound in section Application of Energy Balances in the Absence of Chemical Reactions and Energy Balances: How to Account for Chemical Reaction of Basic Chemical Engineering

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Best answer
Right option is (b) 6 J

The best explanation: Q = 14 – 8 = 6 J.

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