Question

Two kg of water is converted into steam by boiling at atmospheric pressure. The volume changes from $2 \times 10^{- 3}m^{3}$ to $3.34m^{3}.$ The work done by the system is about

• A. – 340 kJ
• B. – 170 kJ
• C. 170 kJ
• D. 340 kJ

Answer 1

Answer: (D)

340 kJ

Answer 2

$W = P\Delta V = 1.01 \times 10^{5}(3.34 - 2 \times 10^{- 3})$

$= 337 \times 10^{3}J \approx 340\mspace{6mu} KJ$