Equation 2nd law thermodynamics

Click For Summary
The second law of thermodynamics does not have a single equation but is fundamentally related to the concept of entropy. It states that entropy in a closed system will always increase over time. A mathematical representation for an isolated system is given by the inequality dS/dt ≥ 0, where S represents entropy and t is time. This highlights that the change in entropy is non-decreasing. Understanding this principle is essential for grasping the implications of thermodynamic processes.
MaoIragorri
Messages
6
Reaction score
0
Can anyone give me the equation for the second law of thermodynamics...
Please.
Thanks
 
Science news on Phys.org
http://lmgtfy.com/?q=2nd+law+of+thermodynamics

There is no straight equation for 'the second law of thermo'.

There is an equation for entropy (there are acutally quite a few eq for entropy).
The second law tells you that entropy will always increase in a closed system.

Is there any specific question you have concerning the 2nd law, as what you asked could have been very easily found using google.
 
Last edited:
Wiki says:

In terms of time variation, the mathematical statement of the second law for an isolated system undergoing an arbitrary transformation is:

\frac{dS}{dt} \ge 0

where

S is the entropy and
t is time.

This, I guess, is an equivalence, not an equation.
Also, note that this is for an isolated system.
 
Cheers Pythagorean... lovely xxChrisxx.
 
Thread 'Can somebody explain this: Planck's Law in action'
Plotted is the Irradiance over Wavelength. Please check for logarithmic scaling. As you can see, there are 4 curves. Blue AM 0 as measured yellow Planck for 5777 K green Planck for, 5777 K after free space expansion red Planck for 1.000.000 K To me the idea of a gamma-Ray-source on earth, below the magnetic field, which protects life on earth from solar radiation, in an intensity, which is way way way outer hand, makes no sense to me. If they really get these high temperatures realized in...

Similar threads

  • · Replies 33 ·
2
Replies
33
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
Replies
1
Views
1K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 100 ·
4
Replies
100
Views
8K
  • · Replies 37 ·
2
Replies
37
Views
5K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 46 ·
2
Replies
46
Views
6K
  • · Replies 13 ·
Replies
13
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K