Find the amount of heat in melting copper, it is known that the mass is 200 kg and the temperature is 10 ^ 75.

The amount of heat required to heat and melt copper:
Q = Q1 + Q2.
Q1 = C * m * (tк – tн), where C – beats. heat capacity of copper (С = 400 J / (К * kg)), m – copper mass (m = 200 kg), tк – melting temperature (tк = 1083 ºС), tн – beginning. temperature (tн = 1075 ºС).
Q2 = λ * m, where λ – beats. heat of fusion of copper (λ = 2.1 * 10 ^ 5 J / kg).
Q = Q1 + Q2 = C * m * (tc – tn) + λ * m = 400 * 200 * (1083 – 1075) + 2.1 * 10 ^ 5 * 200 = 42,640,000 J = 42.64 MJ.
Answer: You need 42.64 MJ of heat.