Question

1 Kg of steam that contains an internal energy of 10 J/Kg, if 10 J of heat is supplied to the system, what is the resultant internal energy of the system?

(a) 10 J/ Kg

(b) 20 J/Kg

(c) 30 J/Kg

(d) 40 J/Kg

The question was posed to me in an interview for internship.

My doubt is from Energy balance for Different type of systems topic in chapter Miscellaneous of Chemical Process Calculation

Answer 1

Correct option is (b) 20 J/Kg

To explain: 10 = 1(U – 10).