Question

In a closed system, change in internal energy is 10 J and heat transferred to it is 10 J what is the work done by the system?

(a) 0

(b) 10 J

(c) -20 J

(d) 20 J

This question was addressed to me in class test.

Asked question is from Simplifications of General Energy Balance topic in chapter 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 answer is (a) 0

For explanation I would say: ∆E = W + Q, => W = 10 – 10 = 0.