Two kg of water is converted into steam by boiling at atmospheric pressure. The volume changes from \[2\times {{10}^{-3}}\,{{m}^{3}}\] to \[3.34{{m}^{3}}.\] The work done by the system is about [Roorkee 2000]

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