Microscopic potential energy of a gas

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Discussion Overview

The discussion revolves around the potential energy of a gas when compressed by a piston in a gas syringe. Participants explore the relationship between work done on the gas, potential energy, and internal energy, while seeking to clarify the factors influencing potential energy in this context.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant questions the increase in potential energy of a gas when compressed and seeks reasons for this phenomenon.
  • Another participant suggests that the work done by the piston adds energy to the system, implying that this energy contributes to the internal energy of the gas rather than its potential energy.
  • A participant clarifies that they are focusing solely on potential energy, separate from kinetic energy considerations.
  • There is a query regarding whether an increase in internal energy necessarily leads to an increase in kinetic energy and temperature of the gas.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the definitions and implications of potential energy versus internal energy, indicating that multiple views remain on the topic.

Contextual Notes

There is a lack of clarity regarding the definitions of potential energy and internal energy, as well as the assumptions underlying their relationship in the context of gas compression.

ay2k
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hello
In a textbook it is stated that if a piston of a gas syringe is used to compress the gas inside. Its Potential Energy increases. Can anyone give me a reason for this?

Also please give me a gross idea that on which factors does potential energy of a gas depends.
 
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hello...
 
The piston is doing work on the gas, thus adding energy the system. If no heat (or other energy) escapes, the internal energy of the gas must increase. (Where you say potential energy, I think you mean internal energy.)

Read this: http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/inteng.html"
 
Last edited by a moderator:
no i was only considering potential energy, disregarding the kinetic energy.
 
that link was helpful...but one last thing...
you say internal energy increases as a whole...does that mean Ek should also increase causing temp to rise as well?
 

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