How Does Box Size Affect Kinetic Energy Calculations in Gas Molecules?

AI Thread Summary
Kinetic energy calculations in gas molecules are influenced by the dimensions of the box used in the analysis, particularly the length L, which determines the time a molecule interacts with the wall. The discussion raises a question about whether the box size should be comparable to the force field size of the atom or molecule. This consideration is crucial for accurate kinetic energy calculations, as it affects the time duration for which force is applied. The implications of box size on these calculations highlight the need for clarity in defining the parameters involved. Understanding the relationship between box dimensions and molecular behavior is essential for precise kinetic energy assessments.
majid_mahjoori
In definition and proof of kinetic energy, it uses the second law of Newton. The length of the box is L and it uses this length to define the time of applying the force on the wall. Actually this time should be only time that molecule reaches to the wall and changes its velocity.

My question is:

is this length of box is considered as small as the size of force field of the Atom or Molecule?
 
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Which box?

I think there is some context missing.
 

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