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"Determine which of the following compounds are stable with respect to decomposition into their elements under standard conditions at 25 &C (see Appendix 2A): (a) PCl5(g); (b) HCN(g); (c) NO(g); (d) SO2(g). " How do I determine stability based off of Gibbs free energy values?
You can determine which of the following compounds are stable with respect to decomposition into their elements by analyzing their standard free energies of formation. Compounds with a positive free energy of formation are unstable with respect to the elements. Since PCl5 (g) and SO2 (g) have negative standard free energies of formation, they are thermodynamically stable.
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