Some metal weighing 400 g taken at the melting point. transferred the amount of heat 156 kJ
| May 25, 2021 | education
Some metal weighing 400 g taken at the melting point. transferred the amount of heat 156 kJ. What is this metal if it is completely melted?
Initial data: m (mass of metal for melting) = 400 g; Q (the amount of heat transferred to the metal) = 156 kJ = 156 * 10 ^ 3 J
SI system: m = 400 g = 400/1000 kg = 0.4 kg.
We express the specific heat of fusion of a metal required for its recognition from the formula: Q = λ * m and λ = Q / m.
Let’s perform the calculation: λ = 156 * 10 ^ 3 / 0.4 = 390000 J / kg = 3.9 * 10 ^ 5 J / kg (corresponds to the specific heat of fusion of aluminum).
Answer: The unknown metal is aluminum.
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