How much heat is required to melt a 500 g piece of lead taken at the melting point? specific heat

How much heat is required to melt a 500 g piece of lead taken at the melting point? specific heat of fusion of lead 25 kJ / kg

Given: m (mass of a piece of lead for melting) = 500 g; a piece of lead was taken at the melting temperature (melting point = 327.4 ºС).

Reference values: according to the condition, we take λ (specific heat of fusion of lead) = 25 kJ / kg (25 * 10 ^ 3 J).

The amount of heat required to melt 500 g of lead: Q = λ * m.

Let’s make the calculation: Q = 25 * 10 ^ 3 * 0.5 = 12.5 * 10 ^ 3 J (12.5 kJ).

Answer: You will need 12.5 kJ of heat.