Question

1 J of heat is supplied to the system and 1 kJ of work is done by the system, then the system is which of the following?

(a) Steady state

(b) Unsteady state

(c) Closed

(d) None of the mentioned

I had been asked this question in a national level competition.

Enquiry is from Energy Balances for Closed, Steady-State Systems in division Introduction to Energy Balances for Processes without Reaction and Calculation of Enthalpy Changes of Basic Chemical Engineering

Answer 1

Correct option is (b) Unsteady state

For explanation I would say: ∆E = 1 – 1000 = – 999 J, which is not equal to zero, so the system is unsteady state system.