How does the flow of thermal energy through a closed window illustrate

  • Thread starter jaypee
  • Start date
  • #1
jaypee
How does the flow of thermal energy through a closed window illustrate the second law of thermodynamics? Which direction is the flow when it is cold outside? How outside?

--Please note this is a text book question I can't seem to answer.
 
Last edited by a moderator:

Answers and Replies

  • #2
FZ+
1,561
3
The second law says that all closed systems move towards a state of maximum entropy. In this case, entropy represents the nearness to equilibrium between the energy of the air inside, and the air outside. If we consider the room and outside the room as two components of a closed system, then when they are allowed to randomly mingle through the closed window, the net effect would be to move towards an equilibrium temperature. Hence, overall, the thermal energy moves out of the room into the colder exterior. Energy does go both ways in a random action, but the effect is the transfer of thermal energy out the window.
 

Related Threads on How does the flow of thermal energy through a closed window illustrate

Replies
13
Views
43K
Replies
3
Views
28K
Replies
3
Views
1K
Replies
2
Views
2K
  • Last Post
Replies
2
Views
524
Replies
8
Views
895
Replies
3
Views
11K
Replies
3
Views
2K
Replies
2
Views
727
Top