How much heat is required to heat a 250g brass plate at 300C? Specific heat capacity of brass is 380J / kg * С.

Initial data: m (mass of the heated brass plate) = 250 g (0.25 kg); Δt (preset temperature change of the brass plate) = 300 ºС.

Reference data: according to the condition Сl (specific heat of brass) = 380 J / (kg * ºС).

The required amount of heat for heating a brass plate is determined by the formula: Q = Сl * m * Δt.

Let’s perform the calculation: Q = 380 * 0.25 * 300 = 28500 J (28.5 kJ)

Answer: Requires 28.5 kJ of heat.