Inert Gases and Equilibrium


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Lindsey Chheng 1E
Posts: 110
Joined: Fri Aug 30, 2019 12:16 am

Inert Gases and Equilibrium

Postby Lindsey Chheng 1E » Wed Jan 22, 2020 10:19 am

Why does the addition of an inert gas not affect the equilibrium position?

WesleyWu_1C
Posts: 117
Joined: Thu Jul 25, 2019 12:16 am

Re: Inert Gases and Equilibrium

Postby WesleyWu_1C » Wed Jan 22, 2020 12:35 pm

Because even though by adding the inert gas the pressure inside is increasing, the equilibrium constant is a ratio of the concentration of the products and reactants. The inert gas is not a product or reactant, and the moles and volume of the products and reactants are still the same. Concentration = moles/volume, therefore concentration for all the products and reactants are the same, which mean the equilibrium constant hasn't changed.

Tai Metzger 3K
Posts: 103
Joined: Sat Aug 24, 2019 12:17 am

Re: Inert Gases and Equilibrium

Postby Tai Metzger 3K » Wed Jan 22, 2020 12:41 pm

Kp depends on the partial pressures of the reactants and products. Adding an inert gas would increase the overall pressure but would not affect any of the partial pressures, thus leaving Kp unchanged.

Matthew Tsai 2H
Posts: 101
Joined: Wed Sep 18, 2019 12:20 am

Re: Inert Gases and Equilibrium

Postby Matthew Tsai 2H » Thu Jan 23, 2020 12:15 am

Adding an inert gas does not affect the equilibrium constant because it does not affect the partial pressure of any reactants/products.

Maya Beal Dis 1D
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Joined: Sat Aug 17, 2019 12:16 am
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Re: Inert Gases and Equilibrium

Postby Maya Beal Dis 1D » Thu Jan 23, 2020 9:04 am

Inert gases are inert and thereby do not react with any of the other gases in solution.

Ying Yan 1F
Posts: 101
Joined: Fri Aug 02, 2019 12:16 am

Re: Inert Gases and Equilibrium

Postby Ying Yan 1F » Thu Jan 23, 2020 12:28 pm

Inert gases usually won't react with reactants already present in the reaction, therefore, it will not change the concentration of the reactants nor products, and since the concentrations don't change, the equilibrium remains the same.

vibha gurunathan 1h
Posts: 51
Joined: Mon Oct 07, 2019 12:15 am

Re: Inert Gases and Equilibrium

Postby vibha gurunathan 1h » Thu Jan 23, 2020 12:29 pm

They don't react with either the reactants or products, so it does not shift equilibrium in either direction.


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