How much copper, having a temperature of 1085 degrees, can be melted by transferring to it an amount of heat of 126 KJ?
| September 1, 2021 | education
t = 1085 ° C.
λ = 230,000 J / kg.
Q = 126 kJ = 126000 J.
m -?
Since t = 1085 ° C is the melting point of copper, the amount of thermal energy Q required to melt a substance at the melting temperature is determined by the formula: Q = λ * m.
Where λ is the specific heat of fusion, m is the mass of copper.
We take the specific heat of fusion of copper λ = 230,000 J / kg from the table of the specific heat of fusion of substances.
The copper mass m will be determined by the formula: m = Q / λ.
m = 126,000 J / 230,000 J / kg = 0.547 kg.
Answer: you can melt m = 0.547 kg of copper.
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