Rates And Equilibrium Flashcards
(25 cards)
What is the definition of reaction rate?
The speed at which reactants are converted into products in a chemical reaction.
True or False: Increasing the temperature generally increases the rate of a chemical reaction.
True
What is the effect of concentration on reaction rate?
Increasing the concentration of reactants usually increases the reaction rate.
Fill in the blank: A catalyst _____ the rate of a chemical reaction.
increases
What is dynamic equilibrium?
A state in a reversible reaction where the rates of the forward and reverse reactions are equal.
What does Le Chatelier’s principle state?
If a system at equilibrium is subjected to a change, the system will adjust to counteract that change.
What happens to equilibrium when pressure is increased in a gaseous reaction?
The equilibrium shifts towards the side with fewer moles of gas.
Multiple Choice: Which factor does NOT affect the rate of a chemical reaction? A) Temperature B) Surface area C) Color D) Concentration
C) Color
What is the role of a catalyst in a chemical reaction?
It lowers the activation energy required for the reaction to occur.
True or False: A chemical reaction can reach equilibrium only if it is reversible.
True
Short Answer: What is activation energy?
The minimum energy required for a reaction to occur.
Fill in the blank: In an exothermic reaction, heat is _____ into the surroundings.
released
What is the effect of decreasing temperature on an exothermic reaction at equilibrium?
The equilibrium shifts to the right, favoring the production of products.
Multiple Choice: Which of the following will increase reaction rate? A) Decreasing temperature B) Increasing surface area C) Diluting reactants D) Decreasing pressure
B) Increasing surface area
What is meant by the term ‘rate constant’?
A proportionality constant in the rate equation that is specific to a given reaction at a specific temperature.
True or False: Increasing the surface area of a solid reactant increases the reaction rate.
True
What is the effect of adding an inert gas to a reaction at equilibrium?
It has no effect on the position of the equilibrium.
Fill in the blank: The _____ of a reaction is measured in moles per liter per second (mol/L/s).
rate
Short Answer: Describe what happens to equilibrium when a reactant is added.
The equilibrium shifts to the right, favoring the formation of products.
Multiple Choice: Which of the following factors can shift the position of equilibrium? A) Temperature B) Concentration C) Pressure D) All of the above
D) All of the above
What is the term for a reaction that can proceed in both forward and reverse directions?
Reversible reaction
True or False: In a balanced chemical equation, the total mass of reactants equals the total mass of products.
True
What is the significance of the equilibrium constant (K)?
It quantifies the ratio of concentrations of products to reactants at equilibrium.
Fill in the blank: An increase in the concentration of products will shift the equilibrium to the _____.
left
