Предмет: Физика, автор: rad1970pen

70 балов только сделайте нормально пожалуйста

Приложения:

Ответы

Автор ответа: Vasily1975
1

Ответ: 1068 кДж.

Объяснение:

1) Сначала воду нужно охладить до температуры T=0°C. При этом выделится количество теплоты Q1=c*m*ΔT=4200*3*(10-0)=126000 Дж = 126 кДж.

2) Затем охлаждённую воду нужно превратить в лёд. При кристаллизации воды выделится количество теплоты Q2=λ*m=3,14*10⁵*3=9,42*10⁵ Дж=942 кДж.

3) Искомое количество теплоты Q=Q1+Q2=1068 кДж.

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