12 Questions
What does chemical kinetics study?
The rates and mechanisms of chemical reactions
What is an important factor in determining the rate of a chemical reaction?
Nature of the reactants
Why do reactions occur faster at higher temperatures?
Because molecules have more energy
What is the function of a catalyst in a chemical reaction?
To decrease the activation energy
According to the collision theory, what determines the rate of a chemical reaction?
Frequency of collisions
What happens when the concentration of one or more reactants increases?
The rate of the reaction increases
What is a major reason why reactions may have different rates under the same conditions?
The identity of the reactants is different.
What is the primary function of a catalyst in a chemical reaction?
To lower the activation energy
Why does food spoil more quickly at room temperature than in a refrigerator?
Because the rate of chemical reactions increases at higher temperatures
What is the primary condition necessary for a chemical reaction to occur, according to collision theory?
The reacting particles must collide with each other
What is an effect of increasing the surface area of contact between reactants?
The rate of the reaction increases
What is a characteristic of homogeneous and heterogeneous reactions?
They are classified based on the phase of the reactants
This quiz covers the basics of chemical kinetics, including the rates and mechanisms of chemical reactions, and the factors that affect reaction rates, such as the nature of the reactants and their ability to meet.
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