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Comment on the thermodynamics stability ...

Comment on the thermodynamics stability of `NO_((g))` given that
`1/2N_(2(g))+1/2O_(2(g)) to NO_(g),Delta_(r)H^(theta)=90kJmol^(-1)`
`NO_((g))+1/2O_(2(g))to NO_(2(g)),Delta_(r)H^(theta)d=-74 Kjmol^(-1)`

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`1/2 N_(2(g))+1/2 O_(2(g)) to NO_(g), triangle_(r)H^@="90kJ mol"^(-1)`
`NO_(g)+1/2 O_(2(g)) to NO_(2(g)) , triangle_(r) H^@=-"74 mol"^(-1)`
`NO_(g)` formation is endothermic `(triangleH=+ve)`
`NO_(2(g))` formation is exothermic `(triangleH=-ve)`
`NO_(g)` is thermodynamically unstable.
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