1.

2 moles of N_(2)O_(4) (g) is kept in a closed container at 298 K and 1 atm pressure. It is heated to 596 K when 20% by mass of N_(@)O_(4) (g) decomposes to NO_(2). The resulting pressure is

Answer»

<P>2.4 ATM
1.2 atm
4.8 atm
2.8 atm

Solution :Volume of the closed vessel (V)`=(NRT)/(P)`
`=(2xx0.0821xx298)/(1)=48.9" L"`
`N_(2)O_(4) HARR 2NO_(2)`
`{:("Initial moles",2,0),("Moles after",2-(20)/(100)xx2,2xx0.4),("dissociation",=2-0.4,=0.8" mole"),(,=1.6"mole",):}`
Tota moles present after heating`=1.6+0.8`
`=2.4" moles"`
`P=(nRT)/(V)=(2.4xx0.0821xx596)/(48.9)=2.4" atm"`


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