1.

The reaction of dimerisation of NO_(2) in N_(2)O_(4) is 2NO_(2)hArrN_(2)O_(4). The reaction is carried out by taking 1 mole each of NO_(2) and N_(2)O_(4) in a closed vessel of 1 litre at 400 K. The equilibrium pressure was found to be 77 atm. After attaining the equilibrium, 1 mole of N_(2)O_(4) is added in the quilibrium mixture.The total pressure at equilibrium would be:

Answer»

`65.2 atm`
`121.5 atm`
`140.0 atm`
`128.2 atm`

Solution :`{:(N_(2)O_(4),hArr,2NO_(2)),(2,,1),((2-x),,(1+2x)):}`
`K_(C)=((1+2x)^(2))/((2-x))=4.44`
`:. X=0.7`
TOTAL MOLE `=3+x=3+0.7=3.7`
`=121.50 atm`


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