How much heat is needed to heat a 200 g brass weight from 20 to 28 degrees Celsius?

univerkov | July 25, 2021 | education

Problem data: m (the mass of the taken brass weight) = 200 g (0.2 kg); t0 (initial temperature of the brass weight) = 20 ºС; t (final temperature) = 28 ºС.

Reference values: Cl (specific heat of brass) = 400 J / (kg * K).

The amount of heat expended for heating the taken brass weight is determined by the formula: Q = Сl * m * (t – t0).

Calculation: Q = 400 * 0.2 * (28 – 20) = 400 * 0.2 * 8 = 640 J.

Answer: To heat the taken brass weight, 640 J of heat must be expended.

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.