Equation 2nd law thermodynamics

• MaoIragorri
In summary, the second law of thermodynamics states that entropy will always increase in a closed system, which is mathematically represented by the equation \frac{dS}{dt} \ge 0. However, this is an equivalence rather than a straightforward equation and applies to isolated systems.
MaoIragorri
Can anyone give me the equation for the second law of thermodynamics...
Thanks

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.

What is the Second Law of Thermodynamics?

The Second Law of Thermodynamics states that the total entropy of a closed system will always increase over time. This means that in any spontaneous process, the amount of energy available to do work will decrease.

What is the Equation for the Second Law of Thermodynamics?

The mathematical expression for the Second Law of Thermodynamics is ΔS≥0, where ΔS represents the change in entropy of a system and the symbol ≥ represents "greater than or equal to". This equation means that the entropy of a closed system can never decrease.

What is the Significance of the Second Law of Thermodynamics?

The Second Law of Thermodynamics is significant because it helps to explain why certain processes occur spontaneously and others do not. It also provides a way to quantify the direction and efficiency of energy transfer and conversion in natural systems.

How is the Second Law of Thermodynamics Applied in Real Life?

The Second Law of Thermodynamics has many practical applications, such as in the design of heat engines, refrigeration systems, and power plants. It is also used in fields such as chemistry, biology, and environmental science to understand natural processes and design more efficient systems.

What is the Relationship Between the Second Law of Thermodynamics and Entropy?

The Second Law of Thermodynamics and entropy are closely related. Entropy is a measure of the disorder or randomness of a system, and the Second Law states that the entropy of a closed system will always increase. This means that as energy is transferred or converted, it tends to become more dispersed and less organized, resulting in an increase in entropy.

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