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Консультация № 195660
19.05.2019, 17:33
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1
Здравствуйте! Прошу помощи в следующем вопросе:
Кислород массой 300 г при температуре 320 К охладили изохорно, вследствие чего его давление уменьшилось в 3 раза. Определить изменение внутренней энергии газа и совершённую им работу. Построить график этого процесса в координатах p, V.
Кислород массой 300 г при температуре 320 К охладили изохорно, вследствие чего его давление уменьшилось в 3 раза. Определить изменение внутренней энергии газа и совершённую им работу. Построить график этого процесса в координатах p, V.
Обсуждение
21.05.2019, 17:08
общий
это ответ
Здравствуйте, dar777!
При изохорном процессе
поэтому если давление кислорода уменьшилось в три раза, то и температура уменьшилась в три раза, то есть 
Согласно [1, с. 163, 165], работа, совершённая при изохорном процессе,
кислороду было сообщено количество теплоты, равное
(Дж)
(здесь
u -- масса кислорода, 
г/моль -- молярная масса кислорода, 
-- показатель адиабаты для кислорода, 
Дж/(моль*К) -- универсальная газовая постоянная), то есть теплота была отобрана, внутренняя энергия кислорода изменилась на величину 
Дж.
График процесса показан на рисунке в прикреплённом файле.
При изохорном процессе
поэтому если давление кислорода уменьшилось в три раза, то и температура уменьшилась в три раза, то есть Согласно [1, с. 163, 165], работа, совершённая при изохорном процессе,
кислороду было сообщено количество теплоты, равное (Дж)(здесь
u -- масса кислорода, г/моль -- молярная масса кислорода, -- показатель адиабаты для кислорода, Дж/(моль*К) -- универсальная газовая постоянная), то есть теплота была отобрана, внутренняя энергия кислорода изменилась на величину Дж.График процесса показан на рисунке в прикреплённом файле.
Прикрепленные файлы:
5
Это самое лучшее решение!
Об авторе:
Facta loquuntur.
Facta loquuntur.
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