Найди и исправь ошибки. 1. these flowers are smelling quite nice. 2. are you understading this rule now? 3. it rains at the moments. 4. i am liking black coffee. 5. he is speaking three languages. 6. i think mexico is a beautiful city. 7. restaurants are staying open late in spain. 8. we usually have lunch at one o'clock 9. he is having a flat in the centre 10. what are you thinking of shakespeare

1. these flowers smell quite nice.

2. do you understand this rule now?

3. it is raining at the moments.

4. i like black coffee.

5. he speaks three languages.

6. i think mexico is a beautiful city. ok

7. restaurants stay open late in spain.

8. we usually have lunch at one o'clock -- ok

9. he has a flat in the centre

10. what do you think of shakespeare?

дано:  

m=1 г=0,001 кг 

водород 

v₁=2v₂=v₃ 

t₃=t₁ 

найти  δs 

решение 

при адиабатическом процессе изменения количества теплоты не происходит. поэтому нет и изменения энтропии 

p₁v₁/t₁=p₂v₂/t₂ 

t₁/t₂=p₁v₁/(p₂v₂)=2p₁/p₂ 

адиабатический процесс описывается уравнением 



для двухатомного газа показатель адиабаты равен 7/5 





при изохорном   процессе:  

для двухатомного газа  cv=5/2  r 

δs=m/m cv ln(t₃/t₂)=m/m cv ln(t₁/t₂)=5mr/(2m)*(-2/5  ln2)=(-mr*ln2)/m 

молярная масса водорода m=0.002 кг/моль 

универсальная газовая постоянная r=8.31 дж/(моль к) 

δs=(-0,001*8,31*ln2)/0.002=-2.88 дж/k 

ответ: -2,88 дж/k