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Консультация № 173502
21.10.2009, 12:25
0.00 руб.
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1
Уважаемые эксперты прошу решить задачи.Заранее благодарназа помощь.
223. Баллон вместимостью V=10 л содержит водород массой 1 г. Определить среднюю длину свободного пробега молекул <>. Эффективный диаметр молекулы водорода равен 0,28 нм.
224. При температуре 300 К и некотором давлении средняя длина свободного пробега молекул кислорода равна 0,1 мкм. Чему равно среднее число столкновений, испытываемых молекулой за 1 с, если сосуд откачать до 0,1 первоначального давления? Температуру газа считать постоянной. Эффективный диаметр молекулы кислорода равен 0,36 нм.
223. Баллон вместимостью V=10 л содержит водород массой 1 г. Определить среднюю длину свободного пробега молекул <>. Эффективный диаметр молекулы водорода равен 0,28 нм.
224. При температуре 300 К и некотором давлении средняя длина свободного пробега молекул кислорода равна 0,1 мкм. Чему равно среднее число столкновений, испытываемых молекулой за 1 с, если сосуд откачать до 0,1 первоначального давления? Температуру газа считать постоянной. Эффективный диаметр молекулы кислорода равен 0,36 нм.
Обсуждение
22.10.2009, 14:51
общий
это ответ
Здравствуйте, Яна .
223
Дано:
V=10 л=10-2 м3
(Н2)
М=2*10-3 кг/моль
m=1 г =10-3 кг
d=0.28 нм=0,28*10-9 м
Найти: <[$955$]>
Решение:
<[$955$]>=1/[$8730$]2*pi*d2*n, где n=N/V - концентрация молекул. Количество молекул N=NA*m/M, NA=6*1023 1/моль
Тогда <[$955$]>=V*M/[$8730$]2*pi*d2*NA*m = 9.54*10-9 м
Удачи
223
Дано:
V=10 л=10-2 м3
(Н2)
М=2*10-3 кг/моль
m=1 г =10-3 кг
d=0.28 нм=0,28*10-9 м
Найти: <[$955$]>
Решение:
<[$955$]>=1/[$8730$]2*pi*d2*n, где n=N/V - концентрация молекул. Количество молекул N=NA*m/M, NA=6*1023 1/моль
Тогда <[$955$]>=V*M/[$8730$]2*pi*d2*NA*m = 9.54*10-9 м
Удачи
5
Спасибо большое за решение задачи.
Об авторе:
С уважением
shvetski
С уважением
shvetski
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