A sample of 0.1 g of water at 100°C and normal pressure (1.013 × 105 Nm-2) requires 54 cal of heat energy to convert to steam at 100°C. If the volume of the steam produced is 167.1 cc, the change in internal energy of the sample is -
1
42.2 joule
2
84.5 joule
3
208.7 joule
4
104.3 joule