`1.0 m^(3)` of water is converted into `1671 m^(3)` of steam at atmospheric pressure and `100^(@)C` temperature. The latent heat of vaporisation of water is `2.3xx10^(6) J kg^(-1)`. If 2.0 kg of water be converted into steam at atmospheric pressure and `100^(@)C` temperature, then how much will be the increases in its internal energy? Density of water `1.0xx10^(3) kg m^(-3)`, atmospheric pressure =`1.01xx10^(5) Nm^(-2)`.