The ClO2- ion has a bent shape according to the VSEPR theory. It has two bonding pairs and one lone pair of electrons on the central chlorine atom, resulting in a bent structure.

In the following \(p\text{–}V\) diagram, the equation of state along the curved path is given by \[ (V-2)^2 = 4ap, \] where \(a\) is a constant. The total work done in the closed path is: 