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

gen chem

thermochemistry

QuestionAnswer
______ determines wheter a rxn would be spontaneous thermodynamics
_____ no exchange with surrounding isolated sytem
______ can exchange energy but no matter closed system
_____ exchange both energy and matter open system
_____ no exchange of heat adiabatic
eNdothermic gaiNs heat (+)
in const vol calorimeter the system is adiabatic: no gain/loss of heat
gen formula for enthalpy Hrxn= Hprod- Hreact
+H corresponds to Endothermic process non spontaneous
formula for enthalpy of rxn sumHprod- sumHreactant
bond breakage is always endothermic ( uses energy ) -
bond formation is always exothermic (+) energy released
formula for enthalpy with bond dissociation energy H broken bonds + H bonds formed (energy in - energy released)
bond disociation energy energy required to break bond
_____ measure of disorder entropy
formula for change entropy S (fin)- S (initial)
unit for entropy energy/temp (J/K)
_____ max energy released in a process Gbbs free energy
formula for Gibbs free energy G=H-TS
G is negative then its spontaneous
G is positive then its nonspontaneous
G =0 then its at equilibrium
rate of rxn is dependent on activation energy NOT G
bond dissociation problems bonds broken -bonds formed the ones with subscript numbers are the ones that became broken 2h-->H2 bond break
work done on surroundin - (negative)
system loses heat q= negatve
net enthalpy problems when they give heat of formation Hprod-Hreactants
Created by: smuttz
Popular DAT 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