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Консультация № 138659
30.05.2008, 13:12
0.00 руб.
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1
1
236. Баллон объемом 12 л содержит углекислый газ. Давление газа равно
1 МПа, температура равна 300 К. Определить массу газа в баллоне.
1 МПа, температура равна 300 К. Определить массу газа в баллоне.
Обсуждение
Неизвестный
30.05.2008, 13:33
общий
это ответ
Здравствуйте, Павел Сергеевич!
Воспользуемся уравнением Менделеева-Клапейрона:
p*V=m*R*T/M
где R=8,31 Дж/(моль*К) - универсальная газовая постоянная, p=1 МПа=10<sup>6</sup> Па - давление в баллоне, V=12 л=12*10<sup>-3</sup> м<sup>3</sup> - объём баллона, Т=300 К - температура углексислого газа, M=44*10<sup>-3</sup> кг/моль - его молярная масса, m - искомая масса газа в баллоне; выразим её:
m=p*V*M/(R*T)=10<sup>6</sup>*12*10<sup>-3</sup>*44*10<sup>-3</sup>/(8,31*300)=0,21 кг
Воспользуемся уравнением Менделеева-Клапейрона:
p*V=m*R*T/M
где R=8,31 Дж/(моль*К) - универсальная газовая постоянная, p=1 МПа=10<sup>6</sup> Па - давление в баллоне, V=12 л=12*10<sup>-3</sup> м<sup>3</sup> - объём баллона, Т=300 К - температура углексислого газа, M=44*10<sup>-3</sup> кг/моль - его молярная масса, m - искомая масса газа в баллоне; выразим её:
m=p*V*M/(R*T)=10<sup>6</sup>*12*10<sup>-3</sup>*44*10<sup>-3</sup>/(8,31*300)=0,21 кг
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