They are the same element as the name suggests, but due to their different states i.e. nitrogen is a gas which makes up 70% of our atmosphere and liquid nitrogen is nitrogen cooled down to -196...
Nitrogen only remains a liquid at very low temperatures (-196oc) above this temperature the liquid will return to a gas, so warm it us is the answer, although because of the extreme cold temperatures...
no. Compressed nitrogen need not be insulated. Liquid nitrogen is always insulated. Typically compressed nitrogen is stored at high pressure(over 1000 psi) and liquid nitrogen is kept at less than...