Kinetics Flashcards
chap 5
1
Q
Collision theory
A
2 particles must collide w enough energy for bonds to break and must collide at the right orientation, in order to react
2
Q
Transition state
A
the state when some bonds are in the process of being made and some are in the process of being broken
3
Q
What effect does temp have on ROR? When temp increases, by how much does ROR increase?
A
- ^^ speed of particles
- ^^ energy
- ^^ collisions
rate doubles temp increase
4
Q
What effect does catalyst have on ROR?
A
- dec Ea
- by providing an alternative mechanism w a dec Ea
5
Q
What effect does surface area have on ROR?
A
- ^^ more exposure of particles
- ^^ more sites for reaction available
- ^^ collisions
6
Q
What effect does concentration and pressure have on ROR?
A
- ^^ atoms in given volume
- ^^ collisions
7
Q
What is a maxwell-boltzmann curve and what 2 things does it show? When does the curve shift? What does it never touch?
A
- A graph of energy of molecules against number of molecules, showing Ea and Emp
- When temp inc or dec
- The x axis
8
Q
What 3 things does a catalyst do?
A
- provide alternate reaction mechanism
- which means more molecules have the activation energy
- so ROR inc
9
Q
Why does the Maxwell Boltzman graph start at the origin?
A
All particles have energy at the start of the reaction
