Rate of Change of Entropy

  • Thread starter XianForce
  • Start date
  • #1
XianForce
16
0

Homework Statement


Every second at Niagara Falls, some 5.0 10^3 m3 of water falls a distance of 50.0 m. What is the increase in entropy per second due to the falling water? Assume that the mass of the surroundings is so great that its temperature and that of the water stay nearly constant at 20.0°C. Also assume a negligible amount of water evaporates.


Homework Equations



S = ∫ dQ/T


The Attempt at a Solution



Well, if I divided across by Δt, then I would have an equation set up for the quantity I need.

Temperature is constant, but since there is no real change in temperature or phase, is there any real change in heat? I'm not sure of where to go from here.

EDIT: Nevermind, I figured it out. Potential Energy converts to Kinetic Energy then to Heat Energy. Entropy is Q/T.
 
Last edited:

Answers and Replies

  • #2
kristen marsh
1
0
so how do you solve this problem?
 

Suggested for: Rate of Change of Entropy

  • Last Post
Replies
3
Views
4K
  • Last Post
Replies
18
Views
2K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
5
Views
2K
  • Last Post
Replies
9
Views
2K
Replies
4
Views
1K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
4
Views
3K
  • Last Post
Replies
3
Views
9K
  • Last Post
Replies
8
Views
6K
Top