Calculate the increase in internal energy of 1 kg of water at 100 degrees Celsius when it is converted into steam at the same temperature and at 1atm. The density of water and steam are 1000kg/m3 and 0.6kg/m3 resp. The latent heat of vaporisation of water is 2.25 x 106 J/kg
The Attempt at a Solution
The heat given to convert 1 kg of water to steam is 2.25 x 106 J.
I don't understand whether work is done by the system or on the system in increasing its volume.
The work done (by or on) the system is given by
W=nRTln(V2/V1) as the temperature remains same.
On adding both the values I got a wrong answer.
The correct answer is 2.08 x 106 J.