Balancing Act: Exploring Le Chatelier's Principle in Chemical Reactions

The video explains Les Châteliers' principle, which describes how systems at equilibrium respond to changes in concentration, volume, pressure, and temperature. It uses analogies like skiing and buffets to illustrate how reactions shift to maintain balance. The principle is applied to various scenarios, including changes in gas volume and pressure, and temperature effects on endothermic and exothermic reactions.

What is the main focus of Le Chatelier's Principle?

• To calculate the mass of products

• To determine the color of reactants

• To maintain equilibrium in a system

• To predict the speed of a reaction

What happens when the concentration of reactants is increased in a reaction?

• The reaction shifts to favor reactants

• The reaction stops completely

• The reaction rate decreases

• The reaction shifts to favor products

How does removing products from a reaction affect its equilibrium?

• It shifts the reaction to favor reactants

• It has no effect on the reaction

• It shifts the reaction to favor products

• It slows down the reaction

What effect does increasing the volume of a reaction medium have on a gaseous reaction?

• It shifts the reaction towards the side with more moles

• It shifts the reaction towards the side with fewer moles

• It increases the pressure

• It decreases the temperature

In a gaseous reaction, what happens when pressure is increased?

• The reaction shifts towards the side with fewer moles

• The reaction shifts towards the side with more moles

• The reaction stops

• The reaction rate remains unchanged

Why do changes in volume and pressure primarily affect gaseous reactions?

• Because gases are more colorful

• Because gases have more space between molecules

• Because gases are denser

• Because gases have more mass

How does an increase in temperature affect an endothermic reaction?

• It shifts the reaction towards the reactants

• It shifts the reaction towards the products

• It has no effect

• It decreases the reaction rate

In an exothermic reaction, what is the effect of adding heat?

• The reaction shifts towards the reactants

• The reaction rate increases

• The reaction shifts towards the products

• The reaction stops

What role does heat play in an endothermic reaction?

• Heat acts as a product

• Heat acts as a reactant

• Heat has no role

• Heat decreases the reaction rate

According to Le Chatelier's Principle, what happens when a system is stressed?

• The system stops reacting

• The system remains unchanged

• The system moves further from equilibrium

• The system adjusts to re-establish equilibrium