Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


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. Your email address is only used to allow you to reset your password. See 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
edit
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

APC: Equilibrium

TermDefinition
chemical equilibrium state where the forward reaction rate is equal to the reverse reaction rate
Why is it dynamic each species is actively consumed and produced
Criteria for an equilibrium system 1. constant macroscopic properties(concentrations, pH, color, temperature) 2. closed system 3. shift in response to changes
macroscopic property property observed with the naked eye
closed system system where chemicals do not enter or leave
steady state system that appears to be at equilibrium but chemicals are entering and leaving the system at the same time
Stage 1 reactant concentrations are high, rf is at the highest A+B->
Stage 2 concentrations of A, B, and rf decrease concentrations of C,D, and rr increase A+B<-C+D
Stage 3 concentrations of A,B,C,D are constant rf, rr are equal
Le Chatelier's Principle an equilibrium system will shift when subjected to stress will shift to alleviate the stress
stress any change that favors rf or rr
if the concentration of a chemical species increases... then the system will shift to consume that species
if the concentration of a chemical species decreases... the system will shift to produce that species
when a system shifts to favor the products it... shifts right
when a system shifts to favor the reactants it... shifts left
adding a catalyst... does not affect equilibrium, but the systems will alleviate the stresses applied faster
equilibrium position relative concentrations of chemical species in equilibrium expressed in percent yield
percent yield actual/theoretical x 100
if the percent yield is above 50%... the products are favored
if the percent yield is less than 50%... the reactants are favored
partial pressure pressure exerted by an individual gas in a mixture
partial pressure is to gaseous equilibria as... osmotic pressure is to solution concentration
gas pressure is directly proportional to... gas concentration
osmotic pressure is directly proportional to... solution concentration
the side of equilibrium with the greater sum of coefficients... will be more sensitive to volume change
if temperature is increased in a rigid container... pressure increases, but will not affect equilibrium
as temperature changes are gradual, a system in equilibrium will... shift before the stress is fully applied
when heat is added the endothermic direction is favored due to activation energy requirements
Haber Bosch Reaction N2 + 3H2 = 2NH3 + 92.4 kJ
Haber Reactor -decrease temperature -catalyst is added -pressure increased to 3.5x10^4 kPa
equilibrium expression formula for finding the equilibrium constant in terms of concentrations of products and reactants
equilibrium constant(keq) numerical value that relates the concentrations of products to the concentration of reactants in equilibria -units vary and not expressed -temperature dependent
keq>1 products are favored
keq<1 reactants are favored
equilibrium law the expression of a balanced chemical equation and an equilibrium expression together
reaction quotient(or trial keq) numerical value calculated from taking any set of concentrations and plugging them in to an equilibrium expression
if q>keq proceed left
if q<keq proceed right
if only one chemical species is present in an equilibrium expression... the system will shift to completely alleviate the stress that affects its concentration
ICE Box table that is used to solve calculations in systems of equilibria
mass action expression equilibrium expressions in terms of concentration or partial pressure
how many psi in 1 atm 14.7psi
how many mmHg in 1 atm 760mmHg(torr)
how many kPa in 1 atm 101.3 kPa
how many bar in 1 atm 1.01 bar
ideal gas constant 0.08206 L x atm/(mol x K)
Kp= Kc(RT)^delta n
Created by: katefinneman
Popular Chemistry sets

 

 



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