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Консультация № 197215
26.11.2019, 18:58
0.00 руб.
0
3
1
Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
1. Некоторое количество азота, заключенного в цилиндре под поршнем бесконечно медленно переводят из состояния 1 с параметрами V1 и Р1, в состояние 2 с параметрами V2= V1/3, P2 =4P1. На графике зависимости давления от объема процесс изображается прямой линией. Определить изменение внутренней энергии газа.
2. При изотермическом процессе расширения 1,2 кг азота, газу было сообщено 1200 кДж теплоты. Определить, как изменилось давление азота, если начальная температура его была 27 С.
3. Водород при нормальных условиях имел объем 100 мг. Найти изменение внутренней энергии газа при его адиабатическом расширении до объема 200 м .
1. Некоторое количество азота, заключенного в цилиндре под поршнем бесконечно медленно переводят из состояния 1 с параметрами V1 и Р1, в состояние 2 с параметрами V2= V1/3, P2 =4P1. На графике зависимости давления от объема процесс изображается прямой линией. Определить изменение внутренней энергии газа.
2. При изотермическом процессе расширения 1,2 кг азота, газу было сообщено 1200 кДж теплоты. Определить, как изменилось давление азота, если начальная температура его была 27 С.
3. Водород при нормальных условиях имел объем 100 мг. Найти изменение внутренней энергии газа при его адиабатическом расширении до объема 200 м .
Обсуждение
27.11.2019, 22:08
общий
27.11.2019, 22:08
Адресаты:
В 3 задаче в последней строчке должно быть что - 200 м3? Проверьте, пожалуйста
Об авторе:
С уважением
shvetski
С уважением
shvetski
28.11.2019, 15:52
общий
28.11.2019, 16:12
Адресаты:
Точно. Ошибся. Там должно быть 200 м3. Также вместо 100 мг, должно быть 100 м3
28.11.2019, 21:15
общий
это ответ
Здравствуйте, niron22364!
С учетом нашего общения на минифоруме имеем:
Задача 3
Нормальные условия:
p0=105 Па
T0=273 K
V0=100 м3
V=200 м3
Найти: [$916$]U
Решение:
При адиабатном расширении газ совершает работу за счет убыли своей внутренней энергии:
[$916$]U=-A
Работа газа при расширении
A=p*[$916$]V=p*(V-V0) = 107 Дж
Следовательно
[$916$]U= -107 Дж
Удачи
С учетом нашего общения на минифоруме имеем:
Задача 3
Нормальные условия:
p0=105 Па
T0=273 K
V0=100 м3
V=200 м3
Найти: [$916$]U
Решение:
При адиабатном расширении газ совершает работу за счет убыли своей внутренней энергии:
[$916$]U=-A
Работа газа при расширении
A=p*[$916$]V=p*(V-V0) = 107 Дж
Следовательно
[$916$]U= -107 Дж
Удачи
Об авторе:
С уважением
shvetski
С уважением
shvetski
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