\SI{0,5}{kg} of ice cubes were placed in \SI{1}{l} of water with an initial temperature \SI{0}{\degreeCelsius}. What has to be the initial temperature of the ice for the whole water to freeze? The ice’s enthalpy of fusion is \SI{330}{\kilo\joule\per\kilo\gram}, the specific heat capacity \SI{2,1}{\kilo\joule\per(\kilogram.\degreeCelsius)}. There is no heat exchange with the environment. The density of water ρ=\SI1000kg/m3.