Question

In an open, steady state adiabatic process if the change in kinetic energy is 10 J and change in potential energy is 15 J, what is the work done by the system?

(a) 10 J

(b) 15 J

(c) 25 J

(d) -25 J

The question was asked in unit test.

I'm obligated to ask this question of Simplifications of General Energy Balance in division Application of Energy Balances in the Absence of Chemical Reactions and Energy Balances: How to Account for Chemical Reaction of Basic Chemical Engineering

Answer 1

Right choice is (d) -25 J

The explanation is: -W = ∆KE + ∆PE = 10 + 15 = 25, => W = -25 J.