Предмет: Физика, автор: Аноним

какое количество теплоты необходимо чтобы превратить 1 кг льда при 0 в пар при 100 градусах

Ответы

Автор ответа: Аноним
0
Сначала плавим лед:
Q1 = λ*m = 3,3*10⁵ * 1 = 3,3*10⁵ Дж  (здесь λ - удельная теплота плавления льда)

Далее нагреваем воду до 100°С:
Q2 = c*m*(t2 - t1) = 4200*1*(100-0) = 420 000 = 4,2*10⁵ Дж (здесь с - удельная теплоемкость воды

И, наконец, превращаем воду в пар:
Q3 = r*m = 22,6*10⁵ * 1 = 22,6*10⁵ Дж (здесь r - удельная теплота парообразования

Общее количество теплоты:
Q = Q1+Q2+Q3 = (3,3 + 4,2 + 22,6)*10⁵ ≈ 30*10⁵ Дж = 3 МДж


Автор ответа: Аноним
0
vthcb
Автор ответа: Аноним
0
мерси
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