Sentence:  It would appear that it should be possible to determine unique mechanisms for the thermal and photochemical reactions in both the <WSD>liquid</WSD> and gas phases and to determine values for activation energies of some of the intermediate reactions of atoms and free radicals , as well as information on the heat of dissociation of the carbon halogen bond . 
Meaning of the word marked with <WSD> tags:  the state in which a substance exhibits a characteristic readiness to flow with little or no tendency to disperse and relatively high incompressibility