Before hot stamping, a brass bar weighing 2 kg was heated from 150 to 750 degrees. how much heat did the blank receive?

To find out the heat received by the specified brass blank, consider the formula: Qx = Cl * mb * (t – t0), where Cl – beats. heat capacity of brass (const; in accordance with the condition taken. Cl = 380 J / (kg * K)); mb is the mass of a brass blank (mb = 2 kg); t – temperature before stamping (t = 750 ºС); t0 – initial temperature of the ingot (t0 = 150 ºС).

Let’s perform the calculation: Qx = Cl * mb * (t – t0) = 380 * 2 * (750 – 150) = 456 * 10 ^ 3 J.

Answer: The specified brass bar received 456 kJ of heat.