15 J of work is done by a steady state system, what is the heat

15-j-of-work-is-done-by-a-steady-state-system-what-is-the-heat

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

A. – 15 J

B. 15 J

C. 10 J

D. – 10 J

I have been asked this question during an interview.

The origin of the question is Energy Balances for Closed, Steady-State Systems in section Introduction to Energy Balances for Processes without Reaction and Calculation of Enthalpy Changes of Basic Chemical Engineering

The correct option is B. 15 J

Easiest explanation: 0 = – 15 + Q, => Q = 15 J.