The pressure of a fixed mass of nitrogen gas in a rigid container is monitored as it is cooled towards its liquefaction point of −196 ∘C-196\ ^\circ\text{C}−196 ∘C.
The absolute zero of temperature is −273 ∘C-273\ ^\circ\text{C}−273 ∘C.
Calculate the liquefaction temperature of nitrogen in kelvin.