How much heat will be released when a 21 g iron cylinder is cooled from 82 C ° to 1 C °?

univerkov | May 10, 2021 | education

Problem data: m (the mass of the iron cylinder taken) = 21 g (in the SI system m = 0.021 kg); t1 (initial temperature) = 82 ºС; t2 (final cooling temperature) = 1 ° C.

Constants: Czh (specific heat capacity of iron) = 460 J / (kg * K).

To calculate the heat obtained by cooling the taken iron cylinder, we use the formula: Q = Czh * m * (t1 – t2).

Calculation: Q = 460 * 0.021 * (82 – 1) = 782.46 J.

Answer: When the taken iron cylinder is cooled, 782.46 J of heat will be released.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.