All Flashcards
Describe the process of heat transfer between two objects at different temperatures.
Heat flows from the hotter object to the colder object until both reach thermal equilibrium, where their temperatures are equal, and there's no net heat flow.
What is the effect of increasing temperature on the rate of a reaction, according to collision theory?
Increasing temperature increases the average kinetic energy of molecules, leading to more frequent and forceful collisions, thus increasing the reaction rate.
What is the effect of a catalyst on the activation energy of a reaction?
A catalyst lowers the activation energy of a reaction.
What is the effect of improper orientation during a molecular collision?
If molecules collide with improper orientation, they will not react, even if they possess sufficient energy.
What happens when two objects reach thermal equilibrium?
There is no net heat transfer between the objects, and they have the same temperature.
Compare the kinetic energy of molecules at high and low temperatures.
High Temperature: Molecules have higher average kinetic energy and move faster. | Low Temperature: Molecules have lower average kinetic energy and move slower.
Differentiate between successful and unsuccessful collisions in a chemical reaction.
Successful Collisions: Have proper orientation and sufficient energy to overcome the activation energy. | Unsuccessful Collisions: Lack proper orientation or sufficient energy.