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Консультация № 194295
26.12.2018, 00:44
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Здравствуйте! Прошу помощи в следующем вопросе:
Помогите пожалуйста!!Идеальный газ совершил процесс, в результате которого давление возросло в n раз. Как и во сколько раз изменилась средняя длина свободного пробега и число столкновений каждой молекулы в единицу времени, если процесс: 1) изотермический?
Помогите пожалуйста!!Идеальный газ совершил процесс, в результате которого давление возросло в n раз. Как и во сколько раз изменилась средняя длина свободного пробега и число столкновений каждой молекулы в единицу времени, если процесс: 1) изотермический?
Обсуждение
26.12.2018, 00:45
общий
26.12.2018, 00:45
Помогите, пожалуйста!Физика, тема: вращение твердого тела
Прикрепленные файлы:
30.12.2018, 07:15
общий
это ответ
Здравствуйте, afobon!
Будем считать молекулы газа твёрдыми шариками, имеющими радиус
Можно показать, что среднее число 
столкновений, испытываемых молекулой в единицу времени, задаётся формулой
где
-- средняя абсолютная скорость молекулы (относительно стенок сосуда), 
-- концентрация молекул. Длина 
свободного пробега молекулы задаётся формулой
Если при изотермическом процессе давление возросло в
раз, то во столько же раз уменьшится его объём и увеличится концентрация молекул. Поэтому, как следует из указанных выше формул, средняя длина свободного пробега уменьшится, а среднее число столкновений в единицу времени увеличится в раз.
Литература. А. К. Кикоин, И. К. Кикоин. Молекулярная физика. - М.: Наука, 1976. -- 480 с.
Будем считать молекулы газа твёрдыми шариками, имеющими радиус
Можно показать, что среднее число столкновений, испытываемых молекулой в единицу времени, задаётся формулойгде
-- средняя абсолютная скорость молекулы (относительно стенок сосуда), -- концентрация молекул. Длина свободного пробега молекулы задаётся формулойЕсли при изотермическом процессе давление возросло в
раз, то во столько же раз уменьшится его объём и увеличится концентрация молекул. Поэтому, как следует из указанных выше формул, средняя длина свободного пробега уменьшится, а среднее число столкновений в единицу времени увеличится в раз.Литература. А. К. Кикоин, И. К. Кикоин. Молекулярная физика. - М.: Наука, 1976. -- 480 с.
Об авторе:
Facta loquuntur.
Facta loquuntur.
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