Find the specific heat of fusion if 1800 kJ of heat was required to melt 15 kg of a substance taken at the melting point.

Task data: m (mass of molten substance) = 15 kg; the specified substance was at the melting point; Q (required heat) = 1800 kJ (1800 * 10 ^ 3 J).

To determine the specific heat of fusion of a given substance, we will use the formula: q = Q / m.

Let’s calculate: q = 1800 * 10 ^ 3/15 = 120 * 10 ^ 3 J / kg = 120 kJ / kg.

Answer: The given substance has a specific heat of fusion of 120 kJ / kg.

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