Equation 2nd law thermodynamics

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Discussion Overview

The discussion revolves around the equation or mathematical representation of the second law of thermodynamics, focusing on its implications regarding entropy in closed systems. Participants explore the nature of the law and its mathematical expressions.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant requests the equation for the second law of thermodynamics, indicating a lack of clarity on the topic.
  • Another participant asserts that there is no single equation for the second law, but mentions that there are multiple equations related to entropy, which is central to the law.
  • A third participant provides a mathematical statement regarding the second law, specifically the time variation of entropy for an isolated system, noting that it is more of an equivalence than a straightforward equation.
  • There is a suggestion that the original question could have been easily answered through a search engine, implying a perceived lack of effort in the inquiry.

Areas of Agreement / Disagreement

Participants do not reach a consensus on a singular equation for the second law of thermodynamics, and there are differing views on how to interpret the law and its mathematical representations.

Contextual Notes

There is an emphasis on the distinction between equations for entropy and the second law itself, as well as the specific conditions under which the law applies, such as isolated systems.

Who May Find This Useful

Individuals interested in thermodynamics, particularly those seeking to understand the mathematical formulations and implications of the second law.

MaoIragorri
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Can anyone give me the equation for the second law of thermodynamics...
Please.
Thanks
 
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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.
 

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