[s.p.q.r]

Hi,
Do ideal gases absorb heat for when they expand? I remember reading something but I don't know where to find it again.

Cheers.

[enahs]

Use your ideal gas equations.
PV=nRT

Solve for T. Then evaluate it at two different volumes (one larger then the other). Does the Temperature increase or decrease?

[s.p.q.r]

Thanks for the reply, but that would take some experimenting wouldn't it?

Have you got a straight answer?

Im not a chem student btw.

Thanks

[enahs]

Thanks for the reply, but that would take some experimenting wouldn't it?

Not at all.


You said an ideal gas, all ideal gases obey the ideal gas law.

PV=nRT


You do not even have to use real units and numbers to find out what you want. Just solve for T (temperature) in the ideal gas equation. Make up any number you want for P (pressure), n (number of moles) and R (ideal gas constant). I would suggest using the number 1 for all those you are not interested in, in this case, and then evaluate that at two different volumes (one larger then the other). You do not need real numbers cause you are just observing the kind of change that occurs.

Im not a chem student btw.

Ideal gas is not even chemistry, it is mostly physics, we chemist just use it a lot. But that is irrelevant. Not telling you is about your critically thinking for your self and doing a little work and learning how to examine things. That is the whole point of any science. Plus, this one is really easy to do with super basic algebra.

[iceman]

i don't think so, gasses expand because of the heat applied but don't actually take in any heat from around them. the heat/energy increases the activity between the atom not within the atom

[s.p.q.r]

Hey

Thanks Iceman and Enahs. A Scooby Snack for you both.

[DrCMS]

i don't think so, gasses expand because of the heat applied but don't actually take in any heat from around them. the heat/energy increases the activity between the atom not within the atom

I think you'll find they do absorb heat from around them. 
How do refrigerators work?

[Yggdrasil]

While gasses can take in heat while they are expanding, an expanding gas does not necessarily need to take in heat.  For example, during an adiabatic expansion, the gas expands without exchanging heat with its surroundings.  The temperature of the gas decreases because its internal energy supplies the work necessary for the gas to expand.

[iceman]

exactly what i was thinking Ygg, haha