Will absolute zero change with pressure?

Join the discussion
Ask a follow-up here, or get your own question answered by working scientists, mathematicians and engineers — people, not an autocomplete.
Real named experts · corrections over time · the nuance an AI answer skips
4 replies · 2K views
Walteholic
Messages
1
Reaction score
0
Say we are talking about an ideal gas.

According to ideal gas law (PV=nRT), assuming the gas is now at absolute zero, if we further decrease the pressure of the environment, while keeping the container volume constant, will the gas goes under absolute zero?

I wasn't an expert in Physics so please enlighten me... :sorry:
 
on Phys.org
Walteholic said:
Say we are talking about an ideal gas.

According to ideal gas law (PV=nRT), assuming the gas is now at absolute zero, if we further decrease the pressure of the environment, while keeping the container volume constant, will the gas goes under absolute zero?

I wasn't an expert in Physics so please enlighten me... :sorry:
what is absolute 0 here
 
Walteholic said:
Say we are talking about an ideal gas.

According to ideal gas law (PV=nRT), assuming the gas is now at absolute zero, if we further decrease the pressure of the environment, while keeping the container volume constant, will the gas goes under absolute zero?

I wasn't an expert in Physics so please enlighten me... :sorry:
No, temperature cannot go below absolute zero.

Akhand said:
what is absolute 0 here
http://en.wikipedia.org/wiki/Absolute_zero
 
Walteholic said:
Say we are talking about an ideal gas.

According to ideal gas law (PV=nRT), assuming the gas is now at absolute zero, if we further decrease the pressure of the environment, while keeping the container volume constant, will the gas goes under absolute zero?

I wasn't an expert in Physics so please enlighten me... :sorry:
till now emp. below 0K is not achieved
the day we will achieve there will be a change in the eq.
 
Walteholic said:
PV=nRT
Look at the equation again. For T=0, either V=0 or P=0. You can't get a negative temperature out of it, because you can't have negative pressure nor negative volume.
In other words, you can't decrease pressure below no pressure, and you can't decrease volume below no volume, therefore you can't get negative temperature this way.
 
  • Like
Likes   Reactions: Entanglement