Le Chatelier’s Principle

Le Chatelier’s Principle

A system at ______________ has forward and reverse reactions taking place at ______________ rates and has reaction quotient, Q, ______________ to the equilibrium constant, K. If an equilibrium system experiences a change in conditions that affects the forward and reverse reaction rates differently, then the ______________ are no longer equal, Q will no longer equal ____, and the system is not at ______________. The system will subsequently experience a net reaction in the direction of greater rate (a shift) that will re-establish the equilibrium. Comparing the value of Q to K allows prediction of the ______________ the reaction will shift in order to return to equilibrium. These observations are summarized in Le Châtelier’s principle: if an equilibrium system is stressed, the system will shift in response to the stress to relieve the stress and reestablish equilibrium.


Don't use plagiarized sources. Get Your Custom Essay on
Le Chatelier’s Principle
Just from $13/Page
Order Essay

Either removing a product or adding more of a reactant result in a Q value ______________ K. The equilibrium will shift ______________ until concentrations are achieved that have Q equal to K again. ______________ a product or ______________ a reactant will result in a Q value greater than K and the reaction will shift ______________. In all of these cases, the ending concentrations of reactants and products will be different to the amounts present before the stress was applied, and the value of the equilibrium constant will be ______________.


KP is calculated using partial pressure, which is analogous to concentration. Changing the ______________ of the system or the total pressure will result in changes in concentration to both sides of the equation. This changes the position of equilibrium, but not the value of K, if ______________ are involved in the reaction, and then only when the chemical reaction produces a change in the total ______________ of gas in the system. Increasing the pressure or ______________ the volume result in a shift toward the side of the equation that has ______________ moles of gas. ______________ the pressure or increasing the volume results in a shift toward the side with the ______________ number of moles of gas. If the number of moles of gas is ______________ on both sides of the reaction, changing pressure or volume will not affect the reaction.


Changes to concentration or pressure affect the value of ______ but do not change the value of _____. The equilibrium constant for a reaction changes only if the temperature changes. When an equilibrium shifts in response to a temperature change it is re-established with a different relative composition that exhibits a new value for the equilibrium constant. This is explained by the dependence of the equilibrium constant on the rate constants of the forward and reverse reactions. Since the forward and reverse reactions typically experience different impacts from the change in temperature, the position of equilibrium will change. Considering the ______________ value can allow prediction of the effect caused by change in temperature. Raising the temperature of a system ______________ the energy of the system. The reaction will shift in the direct that uses up energy. For a reaction that is endothermic in the forward direction, increasing the temperature will ______________ the amount of products made. For an exothermic reaction, a temperature increase will result in a shift toward the ______________ so the extra energy can be pulled into bonds and the systemic stress removed. Cooling the system favors product formation in an ______________ reaction.


Addition of a ______________ does not affect the equilibrium position or constant for a reaction. Catalysts lower the ______________ of both the forward and reverse reactions, which causes the equilibrium to be established more ______________.


Practice Problems



Answer the questions about the following reaction that occurs at high temperature:

  1. C(s) + H2O(g) ⇌ CO(g) + H2(g) K = 2.6 at 1000 K ∆Hrxn = 125 kJ/mol
  2. How will the reaction shift if carbon is removed from the reaction?


  1. If the reaction is carried out in a sealed vessel, how will the reaction position shift if the volume of the vessel is reduced?


  1. If the reaction is carried out at 800 K instead, will K change? Explain.

Academic Heros
Calculate your paper price
Pages (550 words)
Approximate price: -

Why Work with Us

Top Quality and Well-Researched Papers

Our writers are encouraged to read and research widely to have rich information before writing clients’ papers. Therefore, be it high school or PhD level paper, it will always be a well-researched work handled by experts.

Professional and Experienced Academic Writers

For one to become part of our team, thorough interview and vetting is undertaken to make sure their academic level and experience are beyond reproach, hence enabling us give our clients top quality work.

Free Unlimited Revisions

Once you have received your paper and feel that some issues have been missed, just request for revision and it will be done. In addition, you can present your work to the tutor and he/she asks for improvement/changes, we are always ready to assist.

Prompt Delivery and 100% Money-Back-Guarantee

All our papers are sent to the clients before the deadline to allow them time to review the work before presenting to the tutor. If for some reason we feel our writers cannot meet the deadline, we will contact you to ask for more time. If this is not possible, then the paid amount will be refunded.

Original & Confidential

Our writers have been trained to ensure work produced is free of plagiarism. Software to check originality are also applied. Our clients’ information is highly guarded from third parties to ensure confidentiality is maintained.

24/7 Customer Support

Our support team is available 24 hours, 7 days a week. You can reach the team via live chat, email or phone call. You can always get in touch whenever you need any assistance.

Try it now!

Calculate the price of your order

Total price:

How it works?

Follow these simple steps to get your paper done

Place your order

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.

Our Services

You have had a hectic day, and still need to complete your assignment, yet it is late at night. No need to panic. Place your order with us, retire to bed, and once you wake up, the paper will be ready.


Essay Writing Service

It does not matter the urgency of your paper, or the academic level, our team is ready to help you 24/7. Just contact us and all your academic needs will be sorted.


Admission Essays & Business Writing Help

A student is often required to write an admission letter requesting to be admitted in a certain institution. For you to be gain that admission in your dream institution, you must write a convincing letter. You can depend on our team for the best admission letters.


Editing Support

Academic writing is not just about getting information and throwing it all over. Our team will ensure you have a polished paper that is coherent and has a good flow of information. We also ensure the paper follows the correct formatting styles like APA, Harvard, MLA, Chicago/Turabian.


Revision Support

If our writers write a paper but you are not satisfied in one way or another, you can always ask for revision. This is totally free. Our writers and editors will revise your paper untill you are be totally satisfied. We as well offer revision for papers not done by our writers at a small fee.