Предмет: Физика, автор: lumekelluke

какое количество теплоты надо сообщить 30кг свинца при температуре 15 С, чтобы его расплавить?

Ответы

Автор ответа: JamesDeath

Дано: Решение:
m = 30кг Q = qm
t = 15 ⁰C q свинца = 25 * 10³ Дж/кг
Найти: q - удельная теплота плавления свинца
Q = ? Q = 25 * 10³ * 30 = 750 * 10³ Дж = 750 кДж
Ответ: 750 кДж.

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