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What is the heat transferred for an unsteady state closed system, if a change in enthalpy is 5 J, and change in pressure is 10 Pa at constant volume 5 m^3?

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What is the heat transferred for an unsteady state closed system, if a change in enthalpy is 5 J, and change in pressure is 10 Pa at constant volume 5 m^3?

(a) 5 J

(b) 50 J

(c) 55 J

(d) 85 J

The question was asked in a job interview.

My query is from Energy Balances Application in Processes topic in chapter 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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Best answer
The correct option is (c) 55 J

Explanation: Q = 5 + 10*5 = 55 J.

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