Two experiments P and Q are performed with water in various states of phases. Both experiments are performed at constant pressures. Heat is supplied to the systems at the same constant rate in both the experiments. The latent heat of fusion, vapourisation and sublimation of water are respectively 334 ~kJ / kg , 2501 kJ / kg and 2834 ~kJ / kg . The phase diagram of water and the temperature-time schematic plots of the