To melt 2 KG of some substance taken at the melting temperature, 240 kJ of heat was spent. What is this?

univerkov | September 20, 2021 | education

Initial data: m (mass of molten substance) = 2 kg; Q (amount of heat expended) = 240 kJ (240 * 10 ^ 3 J).

You can determine the molten substance using the value of its specific heat of fusion: λ = Q / m.

Calculation: λ = 240 * 10 ^ 3/2 = 120 * 10 ^ 3 J.

Answer: Zinc (1.12 … 1.2 * 10 ^ 5 J) and cast iron (0.96 … 1.38 * 10 ^ 5 J) are the closest to the obtained value.

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