If work done on a system is 20 J and a heat of 15 J is taken out, what is the change in internal energy of the system?
(a) 5 J
(b) 10 J
(c) 20 J
(d) 30 J
I have been asked this question during an interview.
The doubt is from Energy balance for Different type of systems topic in section Miscellaneous of Chemical Process Calculation