C18 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.
True or False: The rate of reaction can be affected by temperature.
True
Fill in the blank: Increasing the concentration of reactants generally ______ the rate of reaction.
increases
What effect does a catalyst have on the rate of reaction?
A catalyst increases the rate of reaction without being consumed in the process.
Which of the following factors does NOT affect the rate of reaction: temperature, surface area, or color?
Color
Short Answer: What happens to the rate of reaction when the surface area of a solid reactant increases?
The rate of reaction increases.
What is the relationship between temperature and the kinetic energy of particles?
As temperature increases, the kinetic energy of particles increases.
True or False: A higher temperature results in a slower rate of reaction.
False
What is meant by ‘activation energy’?
Activation energy is the minimum energy required for a reaction to occur.
What is the effect of increasing pressure on the rate of reaction involving gases?
Increasing pressure generally increases the rate of reaction.
Short Answer: Why do smaller particles react faster than larger ones?
Smaller particles have a greater surface area to volume ratio, allowing more collisions.
What does a steep slope in a concentration vs. time graph indicate?
A steep slope indicates a fast rate of reaction.
True or False: The rate of reaction decreases as the reaction progresses.
True
What is the effect of a catalyst on activation energy?
A catalyst lowers the activation energy required for a reaction.
Multiple Choice: Which of the following increases the rate of reaction? A) Decreasing temperature B) Increasing concentration C) Decreasing surface area
B) Increasing concentration
Short Answer: What is the purpose of measuring the rate of reaction in a laboratory?
To understand reaction kinetics and optimize conditions for desired outcomes.
True or False: All reactions occur at the same rate regardless of conditions.
False
Fill in the blank: The ______ effect describes how increasing temperature increases the frequency of collisions.
temperature
What is the effect of light on photochemical reactions?
Light can increase the rate of photochemical reactions.
Multiple Choice: Which factor would most likely slow down a reaction? A) Increasing temperature B) Decreasing concentration C) Adding a catalyst
B) Decreasing concentration
What is the formula to calculate the rate of reaction?
Rate = change in concentration / change in time
Short Answer: Why is it important to control the rate of reaction in industrial processes?
To maximize efficiency, safety, and product yield.
