Calculate the amount of heat released during cooling and further crystallization of 2 kg water.

Calculate the amount of heat released during cooling and further crystallization of 2 kg water. The initial water temperature is 30 degrees Celsius.

To calculate the heat obtained by cooling and crystallizing 2 kg of water, we will use the formula: Q = Cw * m * (t – 0) + λ * m = (Cw * tn + λ) * m.

Variables and constants: Cw – specific heat capacity of water (Cv = 4200 J / (kg * K)); t – initial temperature (t = 30 ºС); λ – specific heat of crystallization (λ = 3.4 * 10 ^ 5 J / kg); m is the mass of water (m = 2 kg).

Let’s make a calculation: Q = (Cw * tn + λ) * m = (4200 * 30 + 3.4 * 10 ^ 5) * 2 = 932 * 10 ^ 3 J (932 kJ).

Answer: 932 kJ of heat will be released.