Question

why do we add 273 to the temperature while dealing with problems on gas equation.
​

Answer 1

Because we need to convert the temperature in Kelvin unit rather than celcius unit.

1°C = 273 Kelvin

so, it's essential to convert the given temperature in celcius to temperature in Kelvin to further proceed the solution

Answer 2

Explanation:

The law states that at constant pressure, the volume of a fixed mass of gas is directly proportional to its absolute temperature. ... This is because all gases get liquefied before reaching a temperature of 273°C.