What about liquid particles in the flatulence phase-changing and lowering the temperature? (Like how an evaporative swamp cooler works)
Comment on Do farts at least nominally increase the overall temperature of the room in which they are extruded?
dgdft@lemmy.world 7 months ago
The short answer to the post title is a hard “yes” due to enthalpy of solvation.
The answer to your followup question would require some modeling — with the main factors being fart composition, body mass, thermal gradient, and room size.
towerful@programming.dev 7 months ago
Successful_Try543@feddit.org 7 months ago
Farts are remarkably dry.
dgdft@lemmy.world 7 months ago
I didn’t take shartery into account, but that’s a great point.
Successful_Try543@feddit.org 7 months 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.
chocrates@piefed.world 7 months ago
Is it any different from hot air exhaled from your lungs?
Successful_Try543@feddit.org 7 months 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.
dgdft@lemmy.world 7 months 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.
CompactFlax@discuss.tchncs.de 7 months ago
But isn’t there some contribution from the delta in pressure?
dgdft@lemmy.world 7 months ago
Yeah, you’re right — there would be some cooling from pressure release.
Successful_Try543@feddit.org 7 months ago
Qualifies mixing of gases as dissolution?
dgdft@lemmy.world 7 months ago
In a nutshell, the bonds in question are intermolecular forces, not bonds between atoms within a molecule.
NoneOfUrBusiness@fedia.io 7 months ago
No no, dissolution does generate heat. It's called heat of solvation.
Eheran@lemmy.world 7 months ago
This is not happening here. There is no solution, everything is a gas.
NoneOfUrBusiness@fedia.io 7 months 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.
xavier666@lemmy.umucat.day 7 months 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