Can Gravity Absorb Heat Energy?

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Discussion Overview

The discussion revolves around the concept of whether gravity can absorb heat energy by converting it into gravitational potential energy. Participants explore various scenarios and mechanisms through which heat energy might interact with gravitational potential energy, touching on theoretical and practical implications.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant suggests that heat is a form of kinetic energy that could be converted into gravitational potential energy when moving against gravity.
  • Another participant introduces the idea of a car converting chemical energy to heat energy and then to kinetic energy, which can subsequently be converted to potential energy when driving uphill.
  • A scenario involving pressurized gas released in a vertical pipe is proposed, questioning whether the temperature of the gas would differ based on the release point, considering the role of gravity in diffusion.
  • A participant mentions that the conversion of kinetic energy of air molecules into gravitational potential energy helps keep the atmosphere from escaping Earth, linking this to temperature variations with altitude.
  • There is a reiteration of the idea that if air molecules convert heat energy to gravitational potential energy and then fall, this potential energy would convert back to kinetic energy.
  • One participant requests references to support the idea that these processes do not violate the second law of thermodynamics, indicating a desire for a deeper understanding of the underlying principles.

Areas of Agreement / Disagreement

Participants express various viewpoints on the relationship between heat energy and gravitational potential energy, with no consensus reached on whether gravity can absorb heat energy in the proposed manner. Multiple competing views remain regarding the mechanisms and implications of these conversions.

Contextual Notes

Participants do not fully explore the assumptions behind their claims, and there are unresolved questions about the definitions of energy types and the specific conditions under which these conversions might occur.

Who May Find This Useful

This discussion may be of interest to those studying thermodynamics, gravitational physics, or anyone curious about the interactions between heat energy and gravitational potential energy in various contexts.

calebhoilday
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Can gravity absorb heat energy by converting it into gravitational potential energy?

I always imagine heat is just kinetic energy but more randomised. meaning that if such movement occurs against the force of gravity then, it is converted to gravitational potential energy.
 
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Well, it depends on what exactly the constraints of your question are: a car converts chemical energy to heat energy to kinetic energy...which can then be converted to potential energy if you drive uphill.
 
well how about you have pressurised gas in a canister and you then release it into a long capped end pipe, that is vertical. If i released it in from the bottom, would it be cooler than if released from the top. Based on the idea that diffusion is powered by heat energy and when released from the bottom it works against gravity and from the top, gravity aids it.

Can heat turn directly into gravitational potential energy.
 
I suppose a gun firing up would probably also qualify: chemical energy -> heat energy -> kinetic and potential energy.
 
So, yes to the above?
 
calebhoilday said:
Can heat turn directly into gravitational potential energy.
Conversion of kinetic energy of air molecules into gravitational potential energy is the main reason that the atmosphere does not leave the earth. The air molecules do not have sufficient kinetic energy at atmospheric temperatures to escape Earth's gravity. It is also a factor causing temperature to decrease with increasing altitude.

AM
 
So, if these molecules that have converted heat energy to gravitational potential energy, condense then fall, gravitational potential energy is converted to kinetic energy?
 
calebhoilday said:
So, if these molecules that have converted heat energy to gravitational potential energy, condense then fall, gravitational potential energy is converted to kinetic energy?
Correct.

AM
 
Can anyone link me to something that such a situation does not defy the second law of thermodynamics. It probably has to do with pressure and i would like have a better understanding.
 

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