Calculate how much heat is needed to melt lead weighing 0.6 kg and having a temperature of 327 C.
| December 13, 2020 | education
The melting point of lead is 327.4, so we first heat up by 0.4 degrees (although, in principle, this can be neglected):
Qheat = cm (t-to) = 130 * 0.6 * 04 = 31.2 J
Melting energy: Q = λm = 0.6 * 25000 = 15000 J
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