Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRev

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Removal / Addition of inert gas at equilibrium

At constant volume:

Addition / removal of inert gas have no effect at equilibrium at constant volume.

At constant pressure:

If inert gas is added then to maintain the pressure constant, volume is increase.

Hence equilibrium will shift in the direction in which larger no. of moles of gas is formed.

(i)         Δng> 0

            Reaction will shift in forward direction.

(ii)        Δng< 0

            Reaction will shift in backward direction.

(iii)       Δng = 0, No effect


Simultaneous Equilibrium


Series Equilibrium:

When product of Initial reaction acts as reactants in further reactions.

A(S)    Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRevRemoval / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRev      B(g) + C(g)

                        Pi–P     Pi                   Kp1  Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRev  = Pi(Pi – P)

B(g) Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRev    Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRev       D(g) + E(g)

Pi – P               P          P                     Kp2    Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRev  = Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRevRemoval / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRev

 

Parallel Equilibrium:

A(S) Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRevRemoval / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRev B(g) + C(g)             

                P1+P2     P1                          Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRev  = (P1 + P2) P1

X(S) Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRevRemoval / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRevB(g) + D(g)

                P1+P2     P2                          Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRev  = P2(P1 + P2)

When two different reactions gives the same products, called parallel equilibrium.

Example:        NH4I(s) Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRev  Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRev    NH3(g) + HI(g)                       KP1 = 16

                        2 HI(g) Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRev    Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRev   H2(g) + I2 (g)

Pressure of Hydrogen at equilibrium is 1 atm. Calculate the value of KP2.

Solution:         NH4I(s) Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRevRemoval / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRev NH3(g) + HI(g)

                                             Pi – 2        Pi

                        2HI(g) Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRev  Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRev H2(g) + I2(g)

                        Pi – 2             1            1

Kp1 = (Pi – 2) (Pi)

Pi = 5.12

KP2 = Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRevRemoval / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium Chemistry Notes | EduRev= 0.103

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