A question on Liquid Nitrogen!?

Question

Ok i know some basics about liquid nitrogen...

It is a super cooled liquid form of the gas 'Nitrogen'.

It has a boiling point temperature of -196*C (Degrees Celcius)

Questions:

Does liquid nitrogen stay at the same liquid temperature of -196*C under pressure?

If it does, why does this happen?

This is for an experiment im doing involving a nitrogen cooled computer processor.

Thanks in advance to anyone that can help, simple answers would be great ;)

Answer 1

I suggest that you be VERY  careful if you are having to ask on Y/A for information about liquid Nitrogen.

Answer 2

pressurizing liquid nitrogen would allow it to stay liquid at a higher temperature - it behaves similar to most gases, in that pressurizing moves the transition point from liquid to gas up in temperature.

Answer 3

Pressurising a liquid nitrogen container would merely allow it to be kept without losses at room temperature and it is normally kept in vented, insulated vessels where it will keep for a long time, the last lot I used kept for 2 weeks in an open top Dewar flask.

Low temperature is only exhibited as the liquid evaporates, ie. circulating liquid nitrogen through a system will not cool the system unless an evaporating device is included in the circuit, then you have the problem of recompressing or losing the coolant.

If you did want to cool a microprocessor with liquid nitrogen you would have to bathe it in liquid and let that liquid evaporate, which gives rise to other problems like oxygen enrichment as oxygen condenses on the cooled surfaces, and the danger of asphyxiation as the nitrogen displaces air in the room.

If you know this little about liquid nitrogen, it is unlikely that you have the skills or equipment to handle it safely.

BTW, 'supercooled' is a liquid at a temperature at which the substance would normally be solid (eg. Water, below 0 C) not just a low temperature

Answer 4

If you are thinking on keeping liquid Nitrogen cold by applying pressure, forget it. For a liquid to be used as a coolant it must be able to vaporize  to drain the caloric  energy from the source you want to cool. It will start o boil and its pressure can be very high.In fact I used to make some little "bombs" by putting liq. N2 in closed containers at ambient temperature.

Is this what you are thinking?