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.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

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

Equilibrium

GCSE chemistry and combined chemistry

QuestionAnswer
What is a reversible reaction? A reaction which can go from reactants to products but also from products to reactants
What chemical symbol represents a reversible reaction?
If a reaction is exothermic in the forward direction what will it be in the reverse direction? Endothermic
Two reactants require 30kJ to turn into products. What energy transfer is involved when the products turn into reactants? 30kJ is released
What is equilibrium? The point in a reversible reaction when the forward and reverse reactions are occurring at the same rate
How is the amount of reactant changing at equilibrium? It is not changing
How is the amount of product changing at equilibrium? It is not changing
A reaction is exothermic in the forward direction. What will occur if the temperature is increased? The backward reaction will increase as it is endothermic and will reduce the temperature
A reaction is endothermic in the forward direction. What will occur if the temperature is increased? The forward reaction will increase as it is endothermic and will reduce the temperature
A reaction is at equilibrium when some product is removed. What will occur? The forward reaction will increase as that will increase the amount of product
A reaction is at equilibrium when the concentration of a reactant is increased. What will occur? It will move in the forward reaction to reduce the amount of the reactant.
The reaction below is at equilibrium. What will occur when the pressure is increased?2H₂(g) + O₂(g) ⇌ 2H₂O(g) The forward reaction will increase as there are fewer molecules on the right. This will reduce the total number of molecules and therefore the pressure.
What is the Haber process reaction 3H2(g) + N2 (g) ⇌ 2NH3(g)
What temperature is used for the Haber process? 450 oC
Where does the nitrogen for the Haber Process come from? Nitrogen from the atmosphere
Where does the hydrogen for the Haber Process come from? Hydrogen from natural gas
Why are the products of the reaction cooled? To turn the ammonia into a liquid and remove it, so driving the equilibrium in the forward reaction some more.
What is a dynamic equilibrium? A reversible reaction where the forward reaction and the backward reaction happen at the same rate
What catalyst is used for the Haber process? Iron catalyst
What pressure is used for the Haber process? 200 atmospheres
Created by: JBearfield