m1=2 kg of water is poured into the calorimeter at t1=+5 °C and a piece of ice weighing m2=5 kg at t2=-40 °C is placed. Determine the temperature of the contents of the calorimeter after thermal equilibrium has been established. Neglect the heat capacity of the calorimeter and heat exchange with the external environment. The specific heat capacity of water c1=4.2•103 J/(kgK), the specific heat capacity of ice c2=2.1•103 J/(kg-K) and the specific heat of fusion of ice are equal to l=3.3•105 J/kg.
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