Oxidation of gaseous ClF by F2 yields liquid ClF3, an important fluorinating agent. Use the following thermochemical equations to calculate ΔH∘rxn for the production of ClF3:
(1) 2CIF(g)+O2(g)⟶Cl2O(g)+OF2(g) ΔH∘=167.5kJ
(2) 2F2(g)+O2(g)⟶2OF2(g) ΔH∘=−43.5kl
(3) 2CIF3(l)+2O2(g)→Cl2O(g)+3OF2(g) ΔH∘=394.1kJ