Balanced reaction: 2SF4(g) + O2(g) → 2OSF4(g)
1 2 S - 1 2
O - 2 O -
4 8 F - 4 8
Sulfur tetrafluoride (SF4) reacts slowly with O2 to form sulfur tetrafluoride monoxide (OSF4 ) according to the following unbalanced reaction: SF4(g) + O2(g) → OSF4(g). The O atom and the four F atoms in OSF4 are bonded to a central S atom.
Use average bond enthalpies (D(S-F) = 327 kJ/mol, D(O=O) = 495 kJ/mol, D(S=O) = 523 kJ/mol) to estimate the enthalpy of the reaction. Is it endothermic or exothermic?
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