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Le Châtelier’s Principle
16 questions
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- 1. Multiple Choice
What does Le Chatelier's Principle state?
Le Chatelier's principle states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium shifts to counteract the change to reestablish an equilibrium.
Le Chatelier's principle states that the equilibrium of a system is not able to shift in any direction.
Le Chatelier's principle states that if dynamic equilibrium is disturbed, only the increase on the products can reestablish equilibrium.
Le Chatelier's principle states that if dynamic equilibrium is disturbed, only the increase in volume to the reactants can reestablish equilibrium.
- 2. Multiple Choice
True or False: An increase in reactants results in an increase in products.
False
True
- 3. Multiple Choice
What is an exothermic reaction?
A reaction in which heat is lost.
A reaction in which a product is lost.
A reaction that has zero change.
A reaction where heat is gained.
- 4. Multiple Choice
X(g) + Y(g) ⇌ 3 Z(g)
Which direction would equilibrium shift if volume was added to the reactants?
To the left.
To the right.
- 5. Multiple Choice
A + 6B ⇌ 17C + 4D
For the reaction above, which direction will equilibrium shift if the concentration of A is increased?
No shift.
To the right.
To the left.
- 6. Multiple Choice
What is an endothermic reaction?
Heat does not change.
The moles in the product change.
A reaction where heat is gained.
Heat is lost.
- 7. Multiple Choice
H2O(l) + heat ⇌ H2O(g)
In a closed system containing water and vapor, what occurs when the temperature is increased?
Vapor turns into water.
Nothing happens.
More water evaporates.
It's not this answer choice.
- 8. Multiple Choice
2 H2S(g) ⇌ 2 H2(g) + S2(g)
Determine the direction of the equilibrium with the increase in concentration of H2S.
Reaction shifts towards the right.
Reaction shifts towards the left.
Reaction does not shift.
The heat increases on the reactant side.
- 9. Multiple Choice
A + 6B ⇌ 17C + 4D
For the reaction above, which direction will equilibrium shift if the concentration of A is decreased?
No shift.
To the right.
To the left.
- 10. Multiple Choice
CO (g) + H2O (g) ⇌ C (g) + H2O (g)
With volume decreasing, predict the direction of equilibrium.
Shift to the left.
Shift both ways.
Shift to the left.
No shift.
- 11. Multiple Choice
True or False: To reduce the amount of reactants, the products must be increased.
True
False
- 12. Multiple Choice
3 H2(g) + N2(g) ⇌ 2 NH3(g)
What occurs when pressure is increased?
Equilibrium shifts towards the products.
Equilibrium does not shift.
Equilibrium shifts towards the reactants.
Equilibrium shifts towards the products and reactants.
- 13. Multiple Choice
Which of the following answer choices are NOT a stressor for a chemical reaction.
Heat
Time
Pressure
- 14. Multiple Choice
A reaction that does not release or absorb energy is known as a(n) _________ reaction.
Endothermic
Isothermic
Exothermic
Reaction
- 15. Multiple Choice
A change in __________ can only affect substances in the gaseous state.
Liquid?
Heat
Time
Pressure
- 16. Multiple Choice
Le Chatelier's Principle is applicable to which answer choice:
Chemical Equilibrium
Chemical and physical equilibrium
No
Physical Equilibrium
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