Comment on Do farts at least nominally increase the overall temperature of the room in which they are extruded?

dgdft@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

• towerful@programming.dev ⁨3⁩ ⁨weeks⁩ ago

  What about liquid particles in the flatulence phase-changing and lowering the temperature? (Like how an evaporative swamp cooler works)

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  • dgdft@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

    I didn’t take shartery into account, but that’s a great point.

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  • Successful_Try543@feddit.org ⁨2⁩ ⁨weeks⁩ ago

    Farts are remarkably dry.

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• xavier666@lemmy.umucat.day ⁨2⁩ ⁨weeks⁩ ago

  If the room is completely isolated, how can an internal action result in net increase in temperature of the isolated room?

  PS: i have a basic understanding of thermodynamics

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• Successful_Try543@feddit.org ⁨3⁩ ⁨weeks⁩ ago

  Exactly, beside one techniallity:

  The process of fart mixing into ambient air generates heat.

  No, it does not generate heat. It carries a portion of heat from the body and transports it into the ambient air in the room. Almost simultaneously, an equivalent amount of air leaves the room to the outside. The increased heat of the air yields into an increased temperature in the room.

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  • dgdft@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

    The act of mixing is an exothermic chemical process that does in fact explicitly generate heat. You can read up here if curious: en.wikipedia.org/…/Enthalpy_change_of_solution

    I have a degree in physics and work in biomed R&D. I am a qualified fart scientist — this is what I live for.

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    • CompactFlax@discuss.tchncs.de ⁨3⁩ ⁨weeks⁩ ago

      But isn’t there some contribution from the delta in pressure?

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      • dgdft@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

        Yeah, you’re right — there would be some cooling from pressure release.

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    • Successful_Try543@feddit.org ⁨3⁩ ⁨weeks⁩ ago

      Qualifies mixing of gases as dissolution?

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      • dgdft@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

        In a nutshell, the bonds in question are intermolecular forces, not bonds between atoms within a molecule.

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  • NoneOfUrBusiness@fedia.io ⁨3⁩ ⁨weeks⁩ ago

    No no, dissolution does generate heat. It's called heat of solvation.

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    • Eheran@lemmy.world ⁨2⁩ ⁨weeks⁩ ago

      This is not happening here. There is no solution, everything is a gas.

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      • NoneOfUrBusiness@fedia.io ⁨2⁩ ⁨weeks⁩ ago

        Yeah solutions can have any phase of solute and any phase of solvent. The most common example of a solution of gases is the air, so yeah.

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  • chocrates@piefed.world ⁨2⁩ ⁨weeks⁩ ago

    Is it any different from hot air exhaled from your lungs?

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    • Successful_Try543@feddit.org ⁨2⁩ ⁨weeks⁩ ago

      Not much, except the pressure involved is different and flatus contains more methane, carbon oxides and fancy molecules than the air we in- and exhale usually does.

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