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What is the heat transferred to 2 Kg and 5 m3 of a rigid system, with change in enthalpy 5 J/Kg?

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What is the heat transferred to 2 Kg and 5 m3 of a rigid system, with change in enthalpy 5 J/Kg?

(a) 5 J

(b) 10 J

(c) 15 J

(d) 20 J

The question was asked in an online quiz.

Origin of the question is Energy Balances for Closed, Unsteady-State Systems topic in chapter Introduction to Energy Balances for Processes without Reaction and Calculation of Enthalpy Changes of Basic Chemical Engineering

1 Answer

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Best answer
Right choice is (b) 10 J

Best explanation: Since the system is rigid, ∆V = 0, => Q = ∆H = 5*2 = 10 J.

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