Question

15 J of heat and 10 J of work is supplied to a system and 25 J of heat is taken out, then the system is which of the following?

(a) Steady state

(b) Unsteady state

(c) Closed

(d) None of the mentioned

This question was posed to me by my college professor while I was bunking the class.

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

Answer 1

Correct choice is (a) Steady state

The best explanation: ∆E = 15 + 10 – 25 = 0, so the system is steady state system.