How much heat must be expended in order to melt 2 kg of tin taken at the melting temperature?

Initial data: m (tin mass) = 2 kg; the tin was taken at the melting point.

Reference values: λ (specific heat of fusion of tin) = 59 kJ / kg = 59 * 10 ^ 3 J / kg.

The amount of heat that is needed to melt 2 kg of tin is determined by the formula: Q = m * λ.

Let’s perform the calculation: Q = 2 * 59 * 10 ^ 3 = 118 * 10 ^ 3 J = 118 kJ.

Answer: To melt 2 kg of tin, you need to spend 118 kJ of heat.