Rates Of Reaction Flashcards
What is the definition of the rate of reaction?
The rate of reaction is the speed at which reactants are converted into products in a chemical reaction.
Does increasing the temperature generally increases the rate of reaction.
Yes
The rate of reaction can be affected by concentration, temperature, surface area, and what?
catalysts
What is a catalyst?
A catalyst is a substance that increases the rate of a chemical reaction without undergoing permanent change itself.
What effect does increasing the concentration of reactants have on the rate of reaction?
Increasing the concentration of reactants generally increases the rate of reaction.
What is the collision theory?
The collision theory states that for a reaction to occur, reacting particles must collide with sufficient energy and the correct orientation.
Which of the following factors does NOT affect the rate of reaction?
Volume
What is meant by ‘surface area’ in the context of reaction rates?
Volume
Will a higher activation energy usually leads to a faster reaction?
No
What is activation energy?
Activation energy is the minimum energy required for reactants to collide successfully and form products.
Name one method to measure the rate of a reaction.
To monitor the change in mass of reactants or products over time.
The rate of a reaction can be expressed in terms of the change in ______ over time. Fill in the blank
concentration
Which of the following increases the frequency of collisions?
Increasing surface area
What is the effect of a temperature increase on the kinetic energy of particles?
Increasing temperature increases the kinetic energy of particles, leading to more frequent and energetic collisions.
Does the presence of an inhibitor decrease the rate of reaction.
Yes
What is the role of temperature in chemical reactions?
Temperature affects the kinetic energy of particles, influencing both the frequency and energy of collisions.
A reaction that has a higher rate at higher temperatures is said to be what?
endothermic
How does the presence of a catalyst affect the activation energy of a reaction?
A catalyst lowers the activation energy required for a reaction to occur.
Which of the following will NOT affect the rate of a homogeneous reaction?
Surface area
