Does entropy increase behind surface tension?

In summary, minimizing the surface area of a liquid also maximizes total entropy in a constant-volume process, which is related to the partial derivative of Helmholtz energy with respect to surface area of an interface. This means that molecules tend to have maximum entropy when they are at the interior of a liquid.
  • #1
larsa
47
2
Is there any entropic gain when the surface of a liquid is minimised? Per example, molecules "enjoy" maximum entropy when they are at the interior. Is this valid?
 
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  • #2
Surface tension is related to the partial derivative of Helmholtz energy with respect to surface area of an interface, which means that minimizing the surface area also maximizes total entropy in a constant-volume process.
 
  • #3
hilbert2 said:
Surface tension is related to the partial derivative of Helmholtz energy with respect to surface area of an interface, which means that minimizing the surface area also maximizes total entropy in a constant-volume process.

Thank you very much
 

1. What is surface tension?

Surface tension is a physical property that describes the force exerted by the surface of a liquid that allows it to resist external forces and minimize its surface area. It is caused by the cohesive forces between molecules in the liquid.

2. How does surface tension relate to entropy?

Surface tension does not directly affect entropy. However, when a liquid with high surface tension is placed in contact with a lower surface tension liquid, the surface tension difference can drive a process that increases the overall entropy of the system.

3. Does surface tension always increase entropy?

No, surface tension can either increase or decrease entropy depending on the specific system. For example, when two liquids with different surface tensions are mixed, the surface tension difference can drive a process that increases entropy. However, in some cases, surface tension can prevent mixing and decrease entropy.

4. How does entropy increase behind surface tension?

The increase in entropy behind surface tension is due to the mixing of two liquids with different surface tensions. When the two liquids mix, the molecules rearrange in a way that increases the disorder and randomness of the system, resulting in an increase in entropy.

5. Can surface tension be used to measure entropy?

No, surface tension is not a direct measure of entropy. It is a physical property that can indirectly influence entropy in certain systems. Other factors, such as temperature and pressure, also play a significant role in determining entropy.

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