Предмет: Физика, автор: 19651883

В сосуд, имеющий температуру 0°С, впустили пар массой 1 кг при температуре 100°С. Сколько воды изначально было в сосуде, если через некоторое время в нём установилась температура 20°С? Удельная теплоёмкость воды равна 4200 Дж/(кг·°С), удельная теплота парообразования воды - 2,3 МДж/кг.

Ответы

Автор ответа: ЮрВас

mвcвΔtв=mпL+mпcвΔtвп
mв=(mпL+mпcвΔtвп)/(cвΔtв)
mв=(1•2300000+1•4200•80)/(4200•20)=31,4 кг

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