Save
Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't know
Remaining cards (0)
Know
0:00
share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Kinetics

AQA A Level Chemistry

QuestionAnswer
What does collision theory state? For a reaction to take place particles must collide AND they must collide with enough energy to break the bonds in the reactants
How does increasing temperature increase the rate of reaction? This increases the kinetic energy of particles, this increases the frequency and energy of collisions
How does increasing concentration increase the rate of a reaction? There are more particles in a given volume, so they are closer together, resulting in more frequent collisions
How does increasing the pressure of a gas increase the rate of a reaction? There are more particles in a given volume, so they are closer together, resulting in more frequent collisions
How does increasing the surface area of a solid increase the rate of reaction? More particles are exposed and are available to collide, resulting in more frequent collisions
How does a catalyst increase the rate of a reaction? Catalysts provide an alternative pathway with a lower activation energy - this means more particles have the minimum energy for successful collisions to occur
What is activation energy The minimum amount of energy required to break the bonds in the reactants to allow the reaction to occur
What is along the x and y axes in a Maxwell Boltzmann distribution graph? x-energy, y-fraction of particles
Sketch a typical Maxwell Boltzman distribution curve and indicate the average + most probable energy Draw
Why does the Maxwell Boltzmann curve start at zero? No particles have zero energy
Why does the right hand side of the curve ever touch the axid at zero There are no upper limit to the amount of energy some particles may have
What does the area under a Maxwell Boltzmann curve correlate to? The total number of particles
Sketch a typical Maxwell Boltzman distribution curve and another at a higher temperature Draw
What does the area under a Maxwell Boltzman curve at and above Eact represent? The number of particles that have at least the activation energy and above to react
What happens to the number of particles with Eact and above at higher temperatures? Increases
What happens to Eact when a catalyst is used? The Eact with a catalysts is lower, which results in more particles having the minimum energy in order to react successfully
Created by: JBearfield
 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards