Question

At what temperature should all the gases occupy zero volume?

• A. $0^{0}C$
• B. $-{273}^{0}C$
• C. ${273}^{0}C$
• D. ${100}^{0}C$

Answer 1

The correct option is B $-{273}^{0}C$

At absolute zero , that is ) Kelvin the volume of the gas is zero. But its very difficult to achieve.

As per Charle's law, volume of the gas is directly proportional to temperature at constant pressure.

$V\propto T$

$V=KT$

When a graph is plotted volume against temperature

The line is extended till zero volume is obtained. It meets at the point $-{273}^{o}C$, which is equal to $-273+273=0K$

This temperature is called absolute Zero.