Facebook X (Twitter) Instagram
    ScienceMotive
    • Class 9
      • Matter in Our Surroundings
      • Is Matter Around Us Pure
      • Atoms and Molecules
      • Structure of the Atom
      • The Fundamental Unit of Life
    • Class 10
      • Chapter 1: Chemical Reactions and Equations
      • Chapter 2: Acids, Bases & Salts
      • Chapter 3: Metals & Non-Metals
      • Chapter 4: Carbon and its Compounds
      • Chapter 5: Periodic Classification of Elements
      • Chapter 6: Life Processes
      • Chapter 7: Control and Coordination
      • Chapter 8: How Do Organisms Reproduce?
      • Chapter 9: Heredity and Evolution
      • Chapter 10: Light – Reflection and Refraction
      • Chapter 11: Human Eye and the Colourful World
      • Chapter 12: Electricity
      • Chapter 13: Magnetic Effects of Electric Current
      • Chapter 14: Sources of Energy
      • Chapter 15: Our Environment
      • Chapter 16: Management of Natural Resources
    • Class 11
      • Chemisrty 11
        • Chapter – 1 Some Basic Concepts of Chemistry
        • Chapter – 2 Structure Of Atom
        • Chapter – 3 Classification of Elements and Periodicity in Properties
        • Chapter – 4 Chemical Bonding and Molecular Structure
        • Chapter – 5 States of Matter
        • Chapter – 6 Thermodynamics
        • Chapter – 7 Equilibrium
        • Chapter – 8 Redox Reaction
        • Chapter – 10 s-Block Elements
        • Chapter – 13 Hydrocarbons
    • Class 12
      • Chemistry 12
        • The Solid State
        • Solutions
        • Electrochemistry
        • Chemical Kinetics
        • Surface Chemistry
        • p – Block Elements
        • d & f Block Elements
        • Coordination Compounds
        • Haloalkanes and Haloarenes
        • Alcohols, Phenols and Ethers
        • Aldehydes, Ketones and Carboxylic Acids
        • Amines
        • Biomolecules
        • Polymers
        • Chemistry in Everyday Life
    • Practice Questions
      • +1
      • +2
    • Test Series
      • Class 9 Test Series
      • Class 10 Test Series
      • Class 11 Test Series
      • Class 12 Test Series
    • World
      • Current Affairs
      • General Knowledge
    ScienceMotive
    Home » Le Chatelier’s Principle and Applications

    Le Chatelier’s Principle and Applications

    Dr. Vikas JasrotiaBy Dr. Vikas JasrotiaFebruary 17, 2022No Comments
    Share
    Facebook WhatsApp Telegram Twitter Email

    Le Chatelier’s Principle and Applications

    Le Chatelier’s Principle and Applications

    Le Chatelier’s Principle: If a system at equilibrium undergoes a change in concentration, temperature, etc, then the equilibrium shifts itself to neutralize the effect of change.
    1. Changes in Concentration: Adding a reactant or product, the equilibria shifts away from the increase in order to
    consume part of the added substance.
    ⇒ Removing a reactant or product, the equilibria shifts toward the decrease to replace part of
    the removed species.

    2. Effect of change in temperature: Exothermic reactions are favored by low temperature whereas endothermic reactions are favored by high temperature. 

    3. Effect of change of pressure: Low pressure favors those reactions which are accompanied by an increase in the total number of moles and high pressure favors those reactions which take place with a decrease in the total number of moles. However, pressure has no effect on an equilibrium reaction which proceeds with no change in the total number of moles.

    4. Effect of change in volume: The effect of a decrease in volume is equivalent to the effect of an increase in pressure, hence the effect of the decrease in volume will be to shift the equilibrium in the direction in which the number of moles decreases.

    5. Effect of a Catalyst: A catalyst increases the rate of the chemical reaction by making available a new low-energy pathway for the conversion of reactants to products. It increases the rate of forwarding and reverses reactions that pass through the same transition state and do not affect equilibrium. A catalyst lowers the activation energy for the forward and reverses reactions by exactly the same amount. Catalyst does not affect the equilibrium composition of a reaction mixture. It does not appear in the balanced chemical equation or in the equilibrium constant expression. 

    6. Effect of adding an inert gas to a reaction mixture in equilibrium:
    (a) If the reaction takes place at constant volume addition of inert gas will not change the molar concentrations of the reactants and products. Hence, the state of equilibrium will remain unaffected.
    (b) If the reaction takes place at constant pressure, the addition of inert gas must accompany an increase in the total volume to keep the pressure constant. Thus, the reaction shifts towards a larger number of moles.

    Advertisement
    Application of Le Chatelier’s principle to chemical equilibria Effect of change in concentration Effect of change in pressure Effect of change in temperature Le Chatelier’s Principle
    Share. Facebook Twitter Pinterest LinkedIn Tumblr Email
    Dr. Vikas Jasrotia
    • Website

    Related Posts

    Question 2.12: Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 Å. Calculate the threshold frequency (ν0) and work function (W0) of the metal.

    September 29, 2023

    Question 2.11: A 25-watt bulb emits monochromatic yellow light of wavelength of 0.57µm. Calculate the rate of emission of quanta per second.

    September 27, 2023

    Question 2.10: Electromagnetic radiation of wavelength 242 nm is just sufficient to ionize the sodium atom. Calculate the ionization energy of sodium in kJ mol–1.

    September 26, 2023

    Leave A Reply Cancel Reply

    READ ALSO

    Question 2.12: Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 Å. Calculate the threshold frequency (ν0) and work function (W0) of the metal.

    September 29, 2023

    Question 2.11: A 25-watt bulb emits monochromatic yellow light of wavelength of 0.57µm. Calculate the rate of emission of quanta per second.

    September 27, 2023

    Question 2.10: Electromagnetic radiation of wavelength 242 nm is just sufficient to ionize the sodium atom. Calculate the ionization energy of sodium in kJ mol–1.

    September 26, 2023

    Question 2.9: A photon of wavelength 4 × 10–7 m strikes on the metal surface, the work function of the metal is 2.13 eV. Calculate (i) the energy of the photon (eV), (ii) the kinetic energy of the emission, and (iii) the velocity of the photoelectron (1 eV= 1.6020 × 10–19 J).

    September 25, 2023
    +1

    Question 2.12: Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 Å. Calculate the threshold frequency (ν0) and work function (W0) of the metal.

    By Dr. Vikas JasrotiaSeptember 29, 2023

    Question 2.12: Electrons are emitted with zero velocity from a metal surface when it is…

    +1

    Question 2.11: A 25-watt bulb emits monochromatic yellow light of wavelength of 0.57µm. Calculate the rate of emission of quanta per second.

    By Dr. Vikas JasrotiaSeptember 27, 2023

    Question 2.11: A 25-watt bulb emits monochromatic yellow light of wavelength of 0.57µm. Calculate the…

    +1

    Question 2.10: Electromagnetic radiation of wavelength 242 nm is just sufficient to ionize the sodium atom. Calculate the ionization energy of sodium in kJ mol–1.

    By Dr. Vikas JasrotiaSeptember 26, 2023

    Question 2.10: Electromagnetic radiation of wavelength 242 nm is just sufficient to ionize the sodium…

    Advertisement
    Advertisement
    Facebook X (Twitter) Instagram Pinterest YouTube
    • Disclaimer
    • Contact Us
    • Privacy Policy 
    • Terms and Conditions
    © 2023 All Rights Reserved ScienceMotive.

    Type above and press Enter to search. Press Esc to cancel.