Calculate the increase in internal energy of 10 g of water when it is heated from 0∘C to 100∘C and converted into steam at 100 kPa. The density of steam is 0.6 kg m−3, the specific heat capacity of water is 4200 J kg−1∘C−1, and the latent heat of vaporisation is 2.5×106 J kg−1.