Question

What is the work done by saturated water which evaporates to 1 kPa atmosphere to form 2 m^3 of water vapor?

(a) -2 kJ

(b) 2 kJ

(c) -1 kJ

(d) 1 kJ

I got this question during an online exam.

I want to ask this question from Ideal Reversible Processes in section Energy Balances that Include the Effects of Chemical Reaction, Ideal Processes, Efficiency and the Mechanical Energy Balance and Heats of Solution and Mixing of Basic Chemical Engineering

Answer 1

The correct answer is (a) -2 kJ

To explain I would say: Work done = -p∆V = -1*2 = -2 kJ.