O2, Oxygen, has a boiling point of 90K (-183°C), and nitrogen, N2, has a boiling point of 77K (-196° C). Which is a liquid and which is a gas at 80 K (-193°C)?

Answer 1

I find a diagram like this helps with these questions. Do you see the answer?
Not to scale.
101.........H2O gas(steam)
100.........H2O b.p. liq/gas
99..........H2O liquid

20...........room temp H2O liquid
0..........freezing point H2O liq/solid
-1.......... H2O solid

-182............O2 liq? gas?
-183...............b.p. O2 liq/gas
-184..............O2 liq? gas?

-193..............question
-195 N2 gas
-196..............b.p. N2 liq/gas
-197 liq

Answer 2

Nitrogen gas boils at 77K and oxygen boils at -183 Celsius. as liquid air is allowed to warm which gas will escape first?