Reaction stoichiometry, kinetics and thermodynamics ltbgt Nitrosyl chloride `(NOCl)`, is a yellow gas that is most commonly encountered as a decomposition product of aqua regia. It is toxic and irritating to the lungs. On heating `NOCl` decomposes as `2NOClrarr2NO+Cl_(2)`. The enthalpy change `(DeltaH)` for the formation of `1` mole of `Cl_(2)` by the decomposition of `NOCl` is `75.3KJ` between `100.K "to" 600K`. The standard entropies `(S^(@)_(298K))` of different species are as given below: `{:("Substance",NOCl,NO,Cl_(2)),(S_(298K)^(@),264,211,223):}` Calculate `G` of the above decomposition reaction at `298K`.

Reaction stoichiometry, kinetics and thermodynamics ltbgt Nitrosyl chl

1.	Reaction stoichiometry, kinetics and thermodynamics ltbgt Nitrosyl chloride `(NOCl)`, is a yellow gas that is most commonly encountered as a decomposition product of aqua regia. It is toxic and irritating to the lungs. On heating `NOCl` decomposes as `2NOClrarr2NO+Cl_(2)`. The enthalpy change `(DeltaH)` for the formation of `1` mole of `Cl_(2)` by the decomposition of `NOCl` is `75.3KJ` between `100.K "to" 600K`. The standard entropies `(S^(@)_(298K))` of different species are as given below: `{:("Substance",NOCl,NO,Cl_(2)),(S_(298K)^(@),264,211,223):}` Calculate `G` of the above decomposition reaction at `298K`.
Answer» Correct Answer - `2nocLRARR2no+Cl_(2)` `DeltaH^(@)=75.3KJ,DeltaS^(@)=(2xx211+223)-(2xx264)=117` `thereforeDeltaG^(@)=75300-298xx117=40,434` `thereforeDeltaG^(@)=-2.303RT log K_(p) thereforeK_(p)=8.18xx10^(-8)` atm.

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