# Will absolute zero change with pressure?

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1. May 27, 2015

### Walteholic

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...

2. May 27, 2015

### Akhand

what is absolute 0 here

3. May 27, 2015

### Vagn

No, temperature cannot go below absolute zero.

http://en.wikipedia.org/wiki/Absolute_zero

4. May 27, 2015

### Akhand

till now emp. below 0K is not achieved
the day we will achieve there will be a change in the eq.

5. May 27, 2015

### Bandersnatch

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.