What happens when gas is heated?

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Discussion Overview

The discussion revolves around the effects of heating gas, specifically whether all absorbed energy is converted to kinetic energy or if some is converted to potential energy as well. The scope includes conceptual understanding and homework-related inquiry.

Discussion Character

  • Homework-related, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant states that their teacher indicated some absorbed energy is converted into potential energy, while some is converted into kinetic energy.
  • Another participant questions if potential energy is indeed added when gas is heated.
  • A different participant expresses uncertainty about the clarity of the question, noting the absence of potential energy in heated helium compared to heated ammonia, which exhibits vibrational potential energy.
  • One participant agrees that potential energy is not present in monoatomic gases, as they only have translational degrees of freedom.

Areas of Agreement / Disagreement

Participants express differing views on the conversion of absorbed energy in gases, with some asserting that potential energy is involved while others argue it is not for certain types of gases. The discussion remains unresolved regarding the general applicability of these claims.

Contextual Notes

There are limitations regarding the definitions of potential energy in different types of gases, and the discussion does not resolve the conditions under which potential energy may or may not be present.

tigerwoods99
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Homework Statement


What happens when gas is heated?

Is all of the absorbed energy converted to kinetic energy?
or is some of the absorbed energy converted into potential and some into kinetic energy?

Homework Equations





The Attempt at a Solution


My teacher said the correct answer is that some of the absorbed energy is converted into potential energy, and some of the energy is converted into kinetic energy. However, I think that all of the energy is converted into kinetic energy.
 
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so it adds potential energy as well?
 
Yes it does
 
I wonder if the question is clear. I don't see potential energy in heated helium (at least before it gets hot enough to excite to substantial degree), I see potential energy in heated ammonia (vibrations).
 
Yes you are right. Potential energy is not there in monoatomic gases (ideal) as there are only 3 degrees of freedom which are for its translational motion. I forgot about that.
 

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