can oxygen free nitrogen be condensed to a liquid

[studyone]

also does oxygen free nitogen rise in pressure with a rise in temperature

[bibblebub]

Oxygen and nitrogen are separate elements; do you mean air instead of nitrogen?

[Milvus]

What do you mean by oxygen free? Nitrogen is an element it has no other constituent than itself, Nitrogen.

[Calibax]

All gases rise in pressure with a rise in temperature unless you increase their volume accordingly

[GrumpyPom]

I used to leak test Refrigeration systems with what was labled "Oxygen free Nitrogen".

[jomifl]

nitrogen condenses at -196 C, Oxygen at -183 C at atmospheric pressure. If you cooled down a mixture to condense the nitrogen the oxygen would condense first leaving nearly oxygen free nitrogen.

[gingejbee]

Presumably we all mean Oxygen-free, do we?

[theprof]

Oh dear, in the absence of industrial chemists or engineers on AB, it looks like I'll have to put the record straight about oxygen-free nitrogen (OFN).

OFN is an official designation for compressed nitrogen gas with a purity of a minimum of 99.998% N2. OFN is an industrial gas that is usually transported in the form of the compressed gas in cylinders. Bulk transportation of OFN is problematical which means that tinplate manufacturing facilities and steel mills specifying OFN usually receive it in the form of cylinders. OFN is also used in the automotive industry.

(continued)

[theprof]

So what's so special about it? Well, OFN is often used to do such things as purging air in industrial systems where oil is used as a lubricant. If the nitrogen contained a small amount of oxygen (as standard nitrogen gas does), then oil and oxygen equals a big explosion. OFN allows purging without such risk.

In addition, OFN is used for leak testing in industrial refrigeration and air conditioning systems. Industrial laser cutting facilities often use OFN as a gas in sealed cutting chambers which ensure that the cut surfaces of the completed product is oxide-free. There are also industrial chemical polymerisation reactions that would not occur if oxygen was present in the nitrogen used during processing. OFN is also used on a smaller scale during the brazing of copper, brass, high-carbon steels etc where the presence of oxygen leads to unwanted oxidation of the metal.

http://www.boconline....s/nitrogen_oxygen.asp

[wildwood]

Yeah. What the prof said above. (°¿°)

[theprof]

Incidentally to get back to the original question, yes OFN can be condensed to a liquid and yes the pressure in a given volume of OFN increases with temperature. Look up the Gas Law's specifically Gay Lussacs’s law

[theprof]

Thought I'd save you some typing wildwood. Hope my answer meets your approval!

[wildwood]

Well done Sir. Although I feel compelled to point out that you omitted to add a full stop at the end of the paragraph two posts up from here. :-)