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Консультация № 181077
03.12.2010, 07:37
0.00 руб.
0
2
1
Здравствуйте, уважаемые эксперты! Прошу Вас ответить на следующий вопрос:
Смесь азота с массовой долей 87,5% и водорода с массовой долей 12,5% находится в сосуде объемом V = 20 л при температуре Т = 560 К. Определить давление Р смеси, если масса смеси равна 8 г.
Смесь азота с массовой долей 87,5% и водорода с массовой долей 12,5% находится в сосуде объемом V = 20 л при температуре Т = 560 К. Определить давление Р смеси, если масса смеси равна 8 г.
Обсуждение
Неизвестный
03.12.2010, 08:13
общий
03.12.2010, 08:25
это ответ
Здравствуйте, Анна Юрьевна!
5
Спасибо!!!
Неизвестный
03.12.2010, 08:22
общий
Не получилось у меня отправить задачу в хорошо оформленном виде, поэтому вот такое решение
Дано:
V=20л=0,02м^3
T=560 К
m1=0,875 m
m2=0,125 m
m=8г=8*〖10〗^(-3) кг
M1=28*〖10〗^(-3) кг/моль
M2=2*〖10〗^(-3) кг/моль
p - ?
Уравнение Менделеева – Клапейрона для идеального газа:
pV=(m/M)*RT откуда
p=(m/M)*(RT/V) (1)
m=m1+m2 – масса смеси
M=m/ν=(m1+m2)/(m1/M1+m2/M2) – молярная масса смеси
M1 и M2 – молярные массы азота и водорода соответственно
Формула (1) примет вид:
p=((m1+m2)*(m1/M1+m2/M2)*RT/V)/(m1+m2)
p=(m1/M1+m2/M2)*RT/V=p=(0,875m/M1+0,125m/M2)*RT/V
R=8,31 Дж/(моль*К) - универсальная газовая постоянная
p=((0.875*8*[10]^(-3))/(28*[10]^(-3))+(0,125*8*[10]^(-3))/(2*[10]^(-3)))*(8,31*560)/(0,02)=174,51*[10]^3 (Па)
Дано:
V=20л=0,02м^3
T=560 К
m1=0,875 m
m2=0,125 m
m=8г=8*〖10〗^(-3) кг
M1=28*〖10〗^(-3) кг/моль
M2=2*〖10〗^(-3) кг/моль
p - ?
Уравнение Менделеева – Клапейрона для идеального газа:
pV=(m/M)*RT откуда
p=(m/M)*(RT/V) (1)
m=m1+m2 – масса смеси
M=m/ν=(m1+m2)/(m1/M1+m2/M2) – молярная масса смеси
M1 и M2 – молярные массы азота и водорода соответственно
Формула (1) примет вид:
p=((m1+m2)*(m1/M1+m2/M2)*RT/V)/(m1+m2)
p=(m1/M1+m2/M2)*RT/V=p=(0,875m/M1+0,125m/M2)*RT/V
R=8,31 Дж/(моль*К) - универсальная газовая постоянная
p=((0.875*8*[10]^(-3))/(28*[10]^(-3))+(0,125*8*[10]^(-3))/(2*[10]^(-3)))*(8,31*560)/(0,02)=174,51*[10]^3 (Па)
Форма ответа
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