Сколько энергии потребуется для полного расплавления и превращения в пар куска льда массой 2,5 кг, взятого при температуре -20 градусов? (Удельная теплоемкость льда 2100 Дж/кг градусов, удельная теплота плавления льда 340 кДж/кг, удельная теплота парообразования воды 23 МДж/кг.) Помогите пожалуйста

Сколько энергии потребуется для полного расплавления и превращения в пар куска льда массой 2,5 кг, взятого при температуре -20 градусов? (Удельная теплоемкость льда 2100 Дж/кг градусов, удельная теплота плавления льда 340 кДж/кг, удельная теплота парообразования воды 23 МДж/кг.)

Помогите пожалуйста
- Предмет:
  Физика
- Автор:
  darrenoconnor
- 5 лет назад

Ответы 1

Q1=cm(t2-t1)=2100*2,5(0-(-20)=105000 ДжQ2=лямда*m=340000*2,5=850000Q3=cm(t2-t1)=4200*2,5(100-0)=1050000Q4=Lm=2300000*2,5=5750000Qобщ=105000+850000+1050000+5750000=7755000
- Автор:
  sassy
- 5 лет назад
- 0
Добавить свой ответ

Еще вопросы

Укажіть пару однакових чисел, що є розвязком рівняння 5х-3у=14
- Предмет:
  Алгебра
- Автор:
  oneill
- 5 лет назад
- Ответов:
  
  0
- Смотреть
Запишите глаголы изменяя форму. (К одному глаголу все 4 формы).

Глаголы:
Ухаживает.
Отложит.
Кормит.
- Предмет:
  Русский язык
- Автор:
  kramer9lcb
- 5 лет назад
- Ответов:
  
  2
- Смотреть
Проанализируйте и переведите предложения на русский язык.
1.Only by working hard can you hope to achieve success.
2.What was notable in the discussion was that nearly every par ticipant used the English language with uncommon force and precision.
3.No sooner had I shut the door behind me than I realised I had left my key inside.
4.What happened is that the principles of the Direct Method were oversimplified in practice. They were confused with the
Эмфаза
105
“natural method” , in which the language was to be learned the same way as the child learns his mother tongue.
5.Not only did he steal her money, he also half-murderedher.
6.What many people found surprising was that the children took part in the performance most willingly, without the slightest feeling of embarrassment.
7.What it all comes down to is the question whether the novel is a form of art or not. Is its aim to instruct or to please?
8.She saw the door-knobturn slowly; never had she been so frightened.
9.The distant hum of the street traffic was at its faintest.
10.Hardly had I put the phone down when it started ringing again.
11.So that was who it was. Richard the Third. Crouchback. The monster of nursery stories. The destroyer of innocence. A sy nonym for villainy.
12.Everything that can be done the administration has attended to already.
13.This subject we have examined in an earlier chapter, and need not reconsider.
14.Hardly had I left before the trouble started.
15.Only for a very old friend would I do that.
16.On no account must you accept any money if he offers it.
17.It is up to the individual to decide whether or not he or she smokes. But what ought to be stopped is the effort, using ev
ery possible form of persuasion, to start young people on a course which can not end in a great suffering and premature death.
18.Of all differences in the pronunciation of two languages, rhythm is often the most noticeable. What makes a differen tial description of rhythm complicated is that in some lan guages, like English, it is closely connected with a number of different factors.
- Предмет:
  Английский язык
- Автор:
  cassandrawaxw
- 5 лет назад
- Ответов:
  
  1
- Смотреть
найдите значение выражения 2(3x-1)+(2x-5) при x=0,25
- Предмет:
  Алгебра
- Автор:
  amanihqfk
- 5 лет назад
- Ответов:
  
  2
- Смотреть

Ответы 1

Топ пользователей