Determine the specific heat of a substance if its sample weighing 1500 g was heated from 10 degrees to 30 degrees

Determine the specific heat of a substance if its sample weighing 1500 g was heated from 10 degrees to 30 degrees Celsius, having received the amount of heat 22.5 kJ. Determine what substance the sample is made of.

Data: m (mass of the heated sample) = 1500 g (1.5 kg); t0 (initial sample temperature) = 10 ºС; t (final temperature) = 30 ºС; Q (the amount of heat that the sample received) = 22.5 kJ (22.5 * 10 ^ 3 J).

The substance from which the sample was made is determined by the value of its specific heat: Q = C * m * (t – t0) and C = Q / (m * (t – t0)).

Calculation: C = 22.5 * 10 ^ 3 / (1.5 * (30 – 10)) = 750 J / (kg * ºС).

Answer: The sample was made of graphite with a specific heat capacity of 750 J / (kg * ºС).