How many degrees did the temperature of zinc weighing 20 g change if 200 J of energy was released during its cooling?

univerkov | September 10, 2021 | education

Initial data: m (mass of cooled zinc) = 20 g; Q (released energy during zinc cooling) = 200 J.

Reference data: C (specific heat capacity of zinc) = 400 J / (kg * K).

SI system: m = 20 g = 20 * 10 ^ -3 kg.

Determine the change in zinc temperature from the following formula: Q = C * m * Δt and Δt = Q / (C * m).

Let’s make a calculation: Δt = 200 / (400 * 20 * 10 ^ -3) = 25 ºС.

Answer: The zinc temperature decreased by 25 ºС.

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