\[1c{{m}^{3}}\] of water at its boiling point absorbs 540 calories of heat to become steam with a volume of \[1671c{{m}^{3}}\].If the atmospheric pressure = \[1.013x{{10}^{5}}N/{{m}^{2}}\] and the mechanical equivalent of heat = \[4.19J/calorie\], the energy spent in this process in overcoming intermolecular forces is [MP PET 1999, 2001; Orissa JEE 2002]

• A.            540 cal                                    
• B.            40 cal
• C.            500 cal                                    
• D.            Zero