Reaction of gaseous ClF with F₂ yields liquid ClF₃, an im- portant fluorinating agent. Use the following thermochemical equations to calculate ?H�rxn for this reaction: (1) 2ClF(g) + O₂(g) ? Cl2O(g) + OF₂(g)?H�rxn = 167.5 kJ (2) 2F₂(g) + O₂(g) ? 2OF₂(g) ?H�rxn = ?43.5 kJ (3) 2ClF₃(l) + 2O₂(g) ? Cl₂O(g) + 3OF₂(g) ?H�rxn = 394.1 kJ