How much heat needs to be spent in order to melt 2 kg of copper taken at the melting temperature?

The amount of heat required to melt copper taken at the melting temperature is calculated by the formula:
Q = λ * m, where λ is the specific heat of melting of copper (λ = 2.1 * 10 ^ 5 J / kg), m is the mass of copper (m = 2 kg).
Let’s calculate the required amount of heat:
Q = λ * m = 2.1 * 10 ^ 5 * 2 = 4.2 * 10 ^ 5 J = 0.42 MJ.
Answer: To melt 2 kg of copper, you need to spend 0.42 MJ of heat.