For a fixed mass of a gas at constant pressure ,draw `V-t^@C` and `V-TK`graphs. How can the value of absolute zero be obtained from the 1st graph?

Explanation

The graphs are shown in fig 6.14 and fig 6.15 respectively for three different pressures.
The graphs are straight lines in nature

In the `V-t^@C` graph showin in fig 6.14, the three lines corresponding to the three pressures,converge at a point on the negative t axis ,where volume is zero. This point gives the value of absolute zero as per definition.
In the V-T K graph the three straight lines pass through the origin, showing V=0 when T=0.