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Консультация № 194397
10.01.2019, 21:42
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Здравствуйте! Прошу помощи в следующем вопросе:
В вертикальном цилиндре под невесомым поршнем находится 1 моль идеального газа при температуре Т. Пространство над поршнем сообщается с атмосферой. Какую работу необходимо совершить, чтобы медленно поднимая поршень, изотермически увеличить объем под ним в n раз. Трением поршня о стенки сосуда пренебречь.
В вертикальном цилиндре под невесомым поршнем находится 1 моль идеального газа при температуре Т. Пространство над поршнем сообщается с атмосферой. Какую работу необходимо совершить, чтобы медленно поднимая поршень, изотермически увеличить объем под ним в n раз. Трением поршня о стенки сосуда пренебречь.
Обсуждение
15.01.2019, 09:40
общий
это ответ
Здравствуйте, yaroslaw99!
Пусть
-- площадь поршня, 
-- внешняя сила, действующая на поршень, 
-- атмосферное давление, 
-- давление под поршнем (в начальный момент оно равно атмосферному), 
-- объём газа (в начальный момент он равен 
). Тогда при изотермическом расширении
а искомая работа внешней силы составляет
Пусть
-- площадь поршня, -- внешняя сила, действующая на поршень, -- атмосферное давление, -- давление под поршнем (в начальный момент оно равно атмосферному), -- объём газа (в начальный момент он равен ). Тогда при изотермическом расширенииа искомая работа внешней силы составляет
Об авторе:
Facta loquuntur.
Facta loquuntur.
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