How much energy is required to melt 2 kg of copper?

Answer 1

414 kJ

Answer 2

About 0.39 kJ or 0.092 kcal

The heat capacity of copper actually changes with temperature - but not a huge amount so a reasonable estimate is 0.39 kJ/kg·°C or 0.092 kcal/kg·°C (at 25 °C ).

As temperature increases, so does the heat capacity. As temperature decreases, so does the heat capacity:

At -70 °C it drops to about 0.36 kJ/kg·°C.

At 250 °C it rises to about 0.44 kJ/kg·°C

Answer 3

O.385x1x2=0.77 Answer: 0.77

Answer 4

800J