How much heat is required to heat 250 g brass at 20C?

To determine the heat consumption for heating the taken brass, we use the formula: Q = Сl * m * Δt, where Сl is the specific heat capacity of brass (Сl = 400 J / (kg * K)); m is the mass of the brass taken (m = 250 g, in the SI system m = 0.25 kg); Δt is the required temperature change (Δt = 20 ºС).

Let’s calculate: Q = 400 * 0.25 * 20 = 2 * 10 ^ 3 J (2 kJ).

Answer: To heat 250 g of brass at 20 ° C, 2 kJ of heat is required.

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