Question

At what temperature on the Kelvin scale does liquid nitrogen boil? (Its boiling point is $-{196}^{\circ }C.$)

• A. 469 K
• B. 237 K
• C. 330 K
• D. 77 K

Answer 1

The correct option is D 77 K

The relation between Celsius and Kelvin scale is as follows
$0^{\circ }C=273K$
To convert a temperature in Celsius scale to Kelvin scale we have to add 273 to the given temperature.
The boiling point of nitrogen is $-{196}^{\circ }C$.
On Kelvin scale,
$-{196}^{\circ }C$ = -196 + 273
= 77K