Water was poured into the kettle and heated to a temperature of tc = 100 * s. The initial water temperature is 7 * s.

Water was poured into the kettle and heated to a temperature of tc = 100 * s. The initial water temperature is 7 * s. The mass of water is 2 kg. How much heat Q was transferred to the water?

These tasks: t2 (temperature to which the water was heated) = 100 ºС; t1 (initial temperature) = 7 ºС; m (mass of water) = 2 kg.

Reference values: Sv (specific heat capacity of water) = 4200 J / (kg * K).

The amount of heat that the kettle transferred to the water is calculated by the formula: Q = Cw * m * (t2 – t1).

Let’s calculate: Q = 4200 * 2 * (100 – 7) = 781 200 J (781.2 kJ).

Answer: The kettle transferred 781.2 kJ of heat to the water.