In a precision foundry, a high-frequency induction furnace is used to melt a sample of pure copper at its melting point.
During a test run, a mass of 45.0 g of solid copper at its melting temperature is completely converted into liquid copper.
The specific latent heat of fusion of copper is 205 000 J/kg205\,000\text{ J/kg}205000 J/kg.
Calculate the thermal energy transferred to change the state of this mass of copper. Use the equation: energy=mass×specific latent heat\text{energy} = \text{mass} \times \text{specific latent heat}energy=mass×specific latent heat