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A given sample of N(2)O(4) in a closed v...

A given sample of `N_(2)O_(4)` in a closed vessel shows `20%` dissociation in `NO_(2)` at `27^(@)C` and `760 "torr"`. The sample is now heated upto `127^(@)C` and the analysis of mixture shows `60%` dissociation at `127^(@)C`.
The total pressure of equilibrium mixture (in atm) at `127^(@)C` is :

A

`1.78 atm`

B

`2.01 atm`

C

`3.18 atm`

D

`1.33 atm`

Text Solution

Verified by Experts

At `300 K`, `underset(=0.8a)underset(a(1-0.6))underset(a)(N_(2)O_(4))hArrunderset(=0.4a)underset(2xx0.2a)underset(0)(2NO_(2))`
At `400 K`, `underset(0.4a)underset(a(1-0.6))underset(a)(N_(2)O_(4))hArrunderset(1.2a)underset(0.6xx2a)underset(0)(2NO_(2))`
`PV=nRT`
`1xxV=1.2axxRxx300` .....(`1`)
`PV=1.6axxRxx300`
`:.P=1.78 atm` at `400K`
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