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Консультация № 200688
21.04.2021, 10:59
0.00 руб.
0
1
1
Здравствуйте! Прошу помощи в следующем вопросе:
Один моль кислорода (μ = 32 г/моль) находится в сосуде под поршнем. Длина свободного пробега молекул равна λ1. При неизменном давлении температура увеличилась в 3 раза, а длина свободного пробега становится равной λ2. Считая эффективный диаметр молекул неизменным, найти отношение λ2/ λ1
а) 2; б) 0,25; в) 4; г) 3; д) 0,333;
Один моль кислорода (μ = 32 г/моль) находится в сосуде под поршнем. Длина свободного пробега молекул равна λ1. При неизменном давлении температура увеличилась в 3 раза, а длина свободного пробега становится равной λ2. Считая эффективный диаметр молекул неизменным, найти отношение λ2/ λ1
а) 2; б) 0,25; в) 4; г) 3; д) 0,333;
Обсуждение
21.04.2021, 15:49
общий
это ответ
Здравствуйте, Дмитрий!
Предлагаю Вам следующее решение задачи.
Дано: <[$955$]1> -- (средняя) длина свободного пробега молекул кислорода при температуре T1; T2=3T1; p=const -- давление неизменно.
Определить: <[$955$]2>/<[$955$]1> -- отношение (средних) длин свободного пробега молекул кислорода при температурах T2 и T1.
Как указано на странице 204 [1], средняя длина свободного пробега молекул газа при неизменном давлении прямо пропорционально температуре газа. Поэтому если T2=3T1, то и <[$955$]2>=3<[$955$]1>, то есть <[$955$]2>/<[$955$]1>=3.
Ответ: <[$955$]2>/<[$955$]1>=3.
Литература
1. Кухлинг Х. Справочник по физике. -- М.: Мир, 1982. -- 520 с.
Предлагаю Вам следующее решение задачи.
Дано: <[$955$]1> -- (средняя) длина свободного пробега молекул кислорода при температуре T1; T2=3T1; p=const -- давление неизменно.
Определить: <[$955$]2>/<[$955$]1> -- отношение (средних) длин свободного пробега молекул кислорода при температурах T2 и T1.
Решение
Как указано на странице 204 [1], средняя длина свободного пробега молекул газа при неизменном давлении прямо пропорционально температуре газа. Поэтому если T2=3T1, то и <[$955$]2>=3<[$955$]1>, то есть <[$955$]2>/<[$955$]1>=3.
Ответ: <[$955$]2>/<[$955$]1>=3.
Литература
1. Кухлинг Х. Справочник по физике. -- М.: Мир, 1982. -- 520 с.
5
Об авторе:
Facta loquuntur.
Facta loquuntur.
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