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

Chem Final Unit 4

This will contain important info from Unit 4

Question
What is the first law of Thermodynamics? Nrg can flow in or out of a system through heat and work or a system can gain nrg through surroundings and vice versa.
What is important about energy? It can neither be created nor destroyed, just transferred from one place to another
What is an open system? A system where matter can enter and exit
What is a closed system? A system where matter cannot enter but nrg (heat) can
What is an isolated system? A system where matter and nrg cannot enter or leave (fixed)
What is the internal nrg equation? delta E = q + w
What happens when work is negative? Means work is done by system
What happens when work is positive? Means work is done on system
What happens when q (heat) is positive? The system is absorbing nrg -- endothermic
What happens when q (heat) us negative? The system is releasing nrg -- exothermic
What is the 2nd law of Thermodynamics? Heat naturally flows from hot to cold (spontaneous) having the entropy increase
What is important about heat in the 2nd law of Thermodynamics? Heat doesn't naturally flow from cold to hot
What is q measured in? Joules or cal
What is the equation for work? w = -P deltaV
What is the equation for heat? q = mc deltaT
What does q = mc deltaT calculate? Calculates the amount of heat absorbed or released whenever there is a temperature change
What is the latent heat of fusion and vaporization. q = deltaH fus q = deltaH vap
What do the equations of latent heat of fusion and vaporization mean? Calculate the amount of heat absorbed or released whenever there is a phase change
If you are given a calorimeter cup, what is it and what is it used for? A calorimeter Used for finding changes in temps
What is a system? whatever you are investigating or examining
What are surroundings? whatever is coming in contact with that system
What is the calorimetry equation? -q metal = q water
A 32.5 g sample o copper at 45.8 degrees Celsius is placed into 105.3g of water at 15.4 degrees Celsius. What is the final temperature? specific heat of copper = 0.385 J/g C specific heat of water = 4.18 J/g C Tf = 17.2 degrees celsius
Created by: pandabear66*
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