$\"\"$

(a)

The van der Walls equation $\"\"$ .

Differentiate on each side with respect to P.

$\"\"$ .

Product rule of derivatives: $\"\"$ .

$\"\"$

(b)

The values are $\"\"$ .

The rate of change of volume with respect to pressure :

$\"\"$

Substitute corresponding values in the above function.

$\"\"$

Rate of change of volume with respect to pressure is $\"\"$ L / atm.

(a) $\"\"$ .

(b) $\"\"$ L / atm.