Le Chatelier Quiz

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About this activity

Equilibrium shifts explained

Created by

Merida Percino

Mexico

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Froggy Jumps Le Chatelier QuizOnline version Equilibrium shifts explained by Merida Percino 1 What does Le Chatelier's principle predict when a system at equilibrium is subjected to a change of concentration? a The equilibrium constant changes to oppose the change b The system shifts to partially counteract the change by producing/removing species c The reaction rate doubles 2 If a stress increases the temperature of an exothermic reaction at equilibrium, what happens? a The equilibrium shifts to favor the endothermic direction (absorbs heat) b The system stops reacting entirely c The equilibrium constant becomes invalid 3 Adding more of reactant A to a solution at equilibrium will cause which shift? a The reaction reverses completely to original state b The position shifts toward products to consume added A c No shift occurs 4 Which of the following would not cause a shift in equilibrium? a Adding a reactant b Increasing a catalyst concentration c Changing total pressure 5 If a gaseous reaction is carried out at constant temperature and you increase the total pressure, what happens? a The system shifts toward fewer moles of gas b The reaction stops c The equilibrium constant changes sign 6 Le Chatelier's principle applies to which type of system? a Isolated systems with no energy exchange b Chemical equilibria in closed systems c Single-step irreversible reactions 7 An endothermic reaction is heated. What is the expected shift at equilibrium? a Shift toward products (endothermic direction) b Shift toward reactants c No shift occurs 8 If the volume of a gaseous system is decreased at constant temp, what shift occurs when there are more moles on the left? a Shift toward the side with fewer moles of gas b No effect on position c Shift to the right regardless 9 What happens to the equilibrium constant when the temperature changes? a It changes with temperature for most reactions b It becomes undefined c It remains constant regardless of temperature 10 Which action will shift equilibrium toward more products? a Increasing temperature in exothermic direction b Adding more solvent c Removing product as it forms

Froggy Jumps

Le Chatelier QuizOnline version

Equilibrium shifts explained

by Merida Percino

What does Le Chatelier's principle predict when a system at equilibrium is subjected to a change of concentration?

The equilibrium constant changes to oppose the change

The system shifts to partially counteract the change by producing/removing species

The reaction rate doubles

If a stress increases the temperature of an exothermic reaction at equilibrium, what happens?

The equilibrium shifts to favor the endothermic direction (absorbs heat)

The system stops reacting entirely

The equilibrium constant becomes invalid

Adding more of reactant A to a solution at equilibrium will cause which shift?

The reaction reverses completely to original state

The position shifts toward products to consume added A

No shift occurs

Which of the following would not cause a shift in equilibrium?

Adding a reactant

Increasing a catalyst concentration

Changing total pressure

If a gaseous reaction is carried out at constant temperature and you increase the total pressure, what happens?

The system shifts toward fewer moles of gas

The reaction stops

The equilibrium constant changes sign

Le Chatelier's principle applies to which type of system?

Isolated systems with no energy exchange

Chemical equilibria in closed systems

Single-step irreversible reactions

An endothermic reaction is heated. What is the expected shift at equilibrium?

Shift toward products (endothermic direction)

Shift toward reactants

No shift occurs

If the volume of a gaseous system is decreased at constant temp, what shift occurs when there are more moles on the left?

Shift toward the side with fewer moles of gas

No effect on position

Shift to the right regardless

What happens to the equilibrium constant when the temperature changes?

It changes with temperature for most reactions

It becomes undefined

It remains constant regardless of temperature

Which action will shift equilibrium toward more products?

Increasing temperature in exothermic direction

Adding more solvent

Removing product as it forms

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Le Chatelier Quiz

Froggy Jumps

About this activity

Created by

Download the paper version to play

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Le Chatelier QuizOnline version

by Merida Percino

What does Le Chatelier's principle predict when a system at equilibrium is subjected to a change of concentration?

If a stress increases the temperature of an exothermic reaction at equilibrium, what happens?

Adding more of reactant A to a solution at equilibrium will cause which shift?

Which of the following would not cause a shift in equilibrium?

If a gaseous reaction is carried out at constant temperature and you increase the total pressure, what happens?

Le Chatelier's principle applies to which type of system?

An endothermic reaction is heated. What is the expected shift at equilibrium?

If the volume of a gaseous system is decreased at constant temp, what shift occurs when there are more moles on the left?

What happens to the equilibrium constant when the temperature changes?

Which action will shift equilibrium toward more products?

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