Collision/Transition State Theory Flashcards
(21 cards)
What is the basic premise of collision theory?
Chemical reactions occur when particles collide with sufficient energy and proper orientation.
True or False: According to collision theory, all collisions between reactant molecules result in a reaction.
False
Fill in the blank: The minimum energy required for a reaction to occur is called the __________.
activation energy
What factors affect the rate of reaction according to collision theory?
Concentration of reactants, temperature, and surface area.
In transition state theory, what is the transition state?
The high-energy state during a chemical reaction where old bonds are breaking and new bonds are forming.
Multiple Choice: What does the Arrhenius equation relate to?
The relationship between the rate constant and temperature.
What is the role of catalysts in collision theory?
Catalysts lower the activation energy, increasing the rate of reaction.
True or False: The transition state is a stable intermediate in a reaction.
False
Fill in the blank: The energy barrier that must be overcome for a reaction to proceed is known as the __________.
activation energy
What is the significance of the activation energy in collision theory?
It determines the rate at which a reaction can occur; higher activation energy means a slower reaction.
Multiple Choice: Which of the following factors does NOT affect the rate of a chemical reaction?
The color of the reactants.
Define the term ‘reaction coordinate’.
A graphical representation of the progress of a reaction from reactants to products.
True or False: Increasing temperature increases the average kinetic energy of molecules.
True
What is the relationship between molecular orientation and successful collisions?
Proper orientation of colliding molecules is necessary for a reaction to occur.
Fill in the blank: The __________ state is characterized by a maximum potential energy along the reaction coordinate.
transition
What is the effect of increasing concentration on reaction rates?
Increasing concentration generally increases the rate of reaction.
Multiple Choice: Which theory emphasizes the importance of the transition state?
Transition state theory.
What happens to the transition state as the reaction proceeds?
It collapses into products or reverts back to reactants.
True or False: All reactions have a single transition state.
False
What is the significance of molecular collisions in chemical reactions?
They are necessary for the breaking and forming of bonds.
what are the 3 things that the collision theory is based on?
of collisions, breaking bonds, and correct orientation
