The Boltzmann Factor Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

What is KT

A

Average thermal energy per particle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the activation energy?

A

Energy needed to make something happen eg.

Change of state

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

At What range do processes happen at a reasonable rate?

A

When particle have ration Ea/KT between 15-30

So 15-30 kt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How to calculate the fraciton of particles sith extra energy?

A
  • if the extra energy needed is big f will be small as very collisions would result in that activation eneegy
  • the ration is NE=f^N
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Why do very small proportion of particles react?

A

For a fair rate the ration of Ea/KT needs to be betweend 15-30
This means particles would have to get 15-30 times there avergae eneergy when they collide
The fraction this happens would be f^15-30
-so a very small proportions get this activation energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Why is the small fraction of succesfull collisions not negliglbe?

A

-huge numbers of particles collide each second so fraction still adds to a large number

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What does the boltzmann factor tell u?

A

Ratio of particles with energy levels E joules apart (at temperature N)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the boltzmann factor an approximation for?

A

The probability a particle has energy of at least E

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Why does boltzmann factor vary with temp ?

A

For any give reaction k and Ea are fixed so only t changes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is rate of reaction proportional to?

A

Boltzmann factor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly