The jar contains 1 liter of hot water at a temperature of 80 degrees. How much heat is released

The jar contains 1 liter of hot water at a temperature of 80 degrees. How much heat is released when it is cooled to 40 degrees.

Data: V (volume of water in the bank) = 1 l (1 dm3 = 10-3 m3); t1 (initial temperature) = 80 ºС; t2 (temperature after cooling) = 40 ºС.

Reference values: C (specific heat capacity of water) = 4200 J / (kg * K); ρw (water density) = 1000 kg / m3.

The amount of heat released when 1 liter of water is cooled is calculated by the formula: Q = C * ρw * V * (t1 – t2).

Let’s calculate: Q = 4200 * 1000 * 10-3 * (80 – 40) = 168,000 J (168 kJ).

Answer: When 1 liter of hot water is cooled, 168 kJ of heat is released.