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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 the temperature at which `K_(p)` will be double the value at `298K`.

Text Solution

Verified by Experts

The correct Answer is:
`"log"(KP_(2))/(KP_(1))=(DeltaH)/(2.303R)[(1)/(T_(1))-(1)/(T_(2))]`
`therefore "log" 2=(75300)/(2.303xx8.314)[(1)/(298)-(1)/(T_(2))] thereforeT_(2)=305K`.
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