The free radical is CIO intimately involved in reactions that lead to the destruction of ozone in the stratosphere. Given that a chlorine-oxygen bond in CIO2(g) has an enthalpy of 243 kj/mol , an oxygen-oxygen bond has an enthalpy of 498 kj/mol , and the standard enthalpy of formation of CIO2(g) is DH f=102.5 kj/mol , use Hess's law to calculate the value for the enthalpy of formation of CIO (g)