Collision Theory Flashcards
What does a collision cause?
A reaction
What are the conditions for a successful collision?
-correct orientation
-enough activation energy
How does increasing temperature affect the rate of a chemical reaction?
increases speed of molecules > increases kinetic (activation) energy > increases number of successful collisions
What five factors affect the rate of a chemical reaction?
- Increasing temperature
- Increasing solution concentration
- Increasing gas pressure
- Increasing surface area of solid reactants
- Using a catalyst
How does increasing solution concentration affect the rate of a chemical reaction?
more particles in given volume > more contact > collisions frequent > faster
How does increasing gas pressure affect the rate of a chemical reaction?
more gas particles in given volume > more contact > collisions frequent > faster
How does increasing surface area of solid reactants affect the rate of a chemical reaction?
greater total surface area > more particles available > collisions frequent > faster
How does using a catalyst affect the rate of a chemical reaction?
changes rate of chemical reaction by lowering activation energy without being chemical changed > more particles with activation energy > collisions frequent > faster
What is activation energy?
certain amount of minimum kinetic energy required to collide
How does an exothermic reaction react at room temperature with a large activation energy?
extremely slowly > very few particles have Ea > collisions less frequent
How does an exothermic reaction react at room temperature with a small activation energy?
rapidly > many particles with Ea > collisions frequent
