Question for all chemists

[MDCmotorsports]

Well actually a bunch:

-Which gas or liquid heats up the most when compressed?

-Which gas or liquid heats up the quickest when compressed?

-Which gas or liquid expands the most when exposed to atmosphere?

Thanks guys!

:icon_razz

 

[MK3Brent]

Seems the heaviest atomic mass gas element would "heat" the fastest due to it's molecule count.

With that in mind, I'd have to say radon?
Doesn't radon have a atomic mass of 80 some?

I dunno.

 

[MDCmotorsports]

I dunno either.... tiz why Im asking.

 

[MK3Brent]

Drop by your local community college and stumble into a chem class... :rofl:

 

[GrimJack]

Hmm... depends on some other factors, like how much compression and ambient temperatures, to start.

 

[MDCmotorsports]

Ok lets say abiemt temp is 65 deg f, and compression is only 1-6psi.

 

[CTsupra]

don't really know, but i'm guessing natural gas, or carbon dioxide for all.

but this doesn't help 'cause you're looking for exact answers

 

[lanky189]

too bad its not "Questions for Alchemists."

then i could help.

 

[Joel W.]

im no chemist, but id have to guess freon? since they use it for heating and ac cause it heats and expands quickly when compressed?? i know its not water, since water wont compress.. but why do you ask?

 

[GrimJack]

Nope... it'll be one of the element / compounds that changes phase from liquid to gas around 65 degrees and 1-6psi.... for part 3 for sure, and more than likely for the others as well. Are you limited to elements, or can you use compounds as well?

I don't have my handbook of chemistry and physics handy, it's too damn big to carry around, so I can't really look up squat at the moment. If I had to guess at a compound, I'd likely pick tetrafluoroethane, commonly known as R134a, or the refridgerant we use in air conditioning system. (Actually, I might be tempted to pick R12, as it was more efficient than R134a IIRC.) These are the types of conditions that our AC systems are designed to run on, after all. The only problem I can forsee is that there could easily be some compounds that are far more efficient, but are not used due to cost or environmental factors.

Heats up the most is a little bit vague - do you mean gains more energy or do you mean sheds excess heat?

 

[Joel W.]

the new "enviroment green" freon is R410a, but i dont think it works better than old evil r-12, but most hvac systems we installed R-22, but its not legal to sell that equipment here anymore..