A copper piece weighing 3 kg must be melted, the initial temperature of copper is 30 degrees. How much power is required?
| November 24, 2020 | education
Given: m = 3 kg t1 = 30 С t2 = 1085 С (temperature at which copper melts) c = 400 J / kg * С.
Decision:
Q = cm (t2-t1)
Q = 400 J / kg * C * 3kg * (1085 C – 30 C) = 1266000 J.
Answer: Q = 1266000 J.
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