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10 J of work is done on a steady state system, what is the heat supplied to the system?

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10 J of work is done on a steady state system, what is the heat supplied to the system?

(a) – 10 J

(b) 10 J

(c) 5 J

(d) 0

The question was asked during an interview for a job.

This key question is from Energy Balances for Closed, Steady-State Systems topic in portion 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 (a) – 10 J

Explanation: 0 = 10 + Q, => Q = – 10 J.

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