The molar heat capacity of water at constant pressure P, is $\mathrm{75 }\mathrm{J}{\mathrm{K}}^{-1}\mathrm{m}\mathrm{o}{\mathrm{l}}^{-1}$ . When 1.0 kJ of heat is supplied to 100 g of water which is free to expand, the increase in temperature of water is