Consider the following equilibrium: Now suppose a reaction vessel is flled with

Question

Consider the following equilibrium: Now suppose a reaction vessel is flled with 3,21 atm of dinitrogen tetroxide (N,0,) at 1002. °C. Answer the following questions about this system rise inder these cnditons ent n1 Is it possible to reverse this tendency by adding NO2 In other words, if you said the pressure of N,04 will tend to rise, can that be changed to a tendency to fall by adding NO, Similarly, if you said the pressure of N,04 will tend to fall, can that be changed to a tendency to rise by adding NO,? yes O no the pressure of NO, needed to reverse it. to 2 significant digits.

Explanation / Answer

According to Le chatelier's principle , when the system is at equillibrium , it tries to re-estabilish its equillibrium , if there is any change in reaction conditions , by moving the equillibrium towards right or left.

So here :

When the pressure of N2O4 is increased :

The pressure of N2O4 tends to FALL , because the reaction moves in backward direction , to re-estabilish the equillibrium.

YES. If NO2 is added , the reaction moves in forward direction.

Twice the pressure of N2O4 is required , to revrse this.

SO the pressure of NO2 = 2 x 3.21 = 6.4 atm

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