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`

A given sample of `N_(2)O_(4)` in a closed vessel shows `20%` dissocia

1.	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`
Answer» 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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