Chemistry

Problem

The compressibility factor for definite mass of a van der Waals' gas at

0^\circ\text{C}

and 100 atmosphere is found to be 0.5. Assuming the volume of gas molecules negligible, the van der Waals' constant '

a

' for a gas is : a.

1.256 \text{ litre}^2 \text{ mol}^{-2} \text{ atm}

0.256 \text{ litre}^2 \text{ mol}^{-2} \text{ atm}

2.256 \text{ litre}^2 \text{ mol}^{-2} \text{ atm}

0.0256 \text{ litre}^2 \text{ mol}^{-2} \text{ atm}