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Консультация № 195421
30.04.2019, 09:59
0.00 руб.
0
3
1
Здравствуйте! Прошу помощи в следующем вопросе:
В операционной находится баллон с кислородом ёмкостью 20 л. Кислород в нем содержится при температуре 150С. После израсходования части кислорода давление в баллоне понизилось до 7,6 МПа, а температура упала до 100С. Определить массу израсходованного кислорода, если начальное давление было 10 МПа.
Большое спасибо!
В операционной находится баллон с кислородом ёмкостью 20 л. Кислород в нем содержится при температуре 150С. После израсходования части кислорода давление в баллоне понизилось до 7,6 МПа, а температура упала до 100С. Определить массу израсходованного кислорода, если начальное давление было 10 МПа.
Большое спасибо!
Обсуждение
30.04.2019, 10:29
общий
Простите, но в задаче две опечатки. Изначально температура 15 градусов, а упала она до 10 градусов.
30.04.2019, 16:30
общий
это ответ
Здравствуйте, viktorija79!
Дано:
(O2)
M = 32*10-3 кг/м3
V = 20 л = 20*10-3 м3
Т1 = 150+273 = 423 К
Т2 = 100+273 = 373 К
p2 = 7.2*106 Па
р1 = 10*106 Па
Найти: [$916$]m
Решение:
В простейшем случае решение такое...
Считаем кислород идеальным газом. Тогда применим уравнение Менделеева-Клапейрона
p*V= (m/M)*R*T
Отсюда
m=(pVM)/(RT)
Тогда
[$916$]m=m1-m2=(VM/R)*(p1/T1-p2/T2)
После подстановки и расчетов получаем
[$916$]m~1.79 кг
Дано:
(O2)
M = 32*10-3 кг/м3
V = 20 л = 20*10-3 м3
Т1 = 150+273 = 423 К
Т2 = 100+273 = 373 К
p2 = 7.2*106 Па
р1 = 10*106 Па
Найти: [$916$]m
Решение:
В простейшем случае решение такое...
Считаем кислород идеальным газом. Тогда применим уравнение Менделеева-Клапейрона
p*V= (m/M)*R*T
Отсюда
m=(pVM)/(RT)
Тогда
[$916$]m=m1-m2=(VM/R)*(p1/T1-p2/T2)
После подстановки и расчетов получаем
[$916$]m~1.79 кг
5
Огромное Вам спасибо!
Об авторе:
С уважением
shvetski
С уважением
shvetski
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