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
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

EB 2240 Exam II

Exam II Notecards- Bio[chemical] Energetics

QuestionAnswer
What is the Zeroth law of thermodynamics? if two systems are in thermal equilibrium with a third system, they are also in thermal equilbirum with each other
What is the First Law of thermodynamics? Conservation of energy: energy can neither be created nor destroyed. It may change from one form to another, but the energy in a closed system remains constant
What is the Second Law of thermodynamics? Law of increased entropy: the products will always have less PE than the reactants
What is the third law of thermodynamics? the entropy of a perfect crystal at absolute zero is 0. And implies that it is impossible to cool a system a exactly absolute zero
Describe a perpetual motion machine of the first kind Produces work without the input of energy
Why is a perpetual motion machine of the first kind impossible? 1st law--there is a finite amount of energy in the universe (cannot be created from nothing)
Describe a Perpetual Motion Machine of the 2nd kind? Extracts heat from a source and then converts this heat completely into other forms of energy. (only one heat reservoir is involved which is being spontaneously cooled w/o transfer of heat)
Why is the perpetual motion machine of the 2nd kind impossible? Second law of thermodynamics states that the entropy of an isolated system never decreases -- isolated systems are constantly moving towards the maximum state of entropy
Describe a perpetual motion machine of the 3rd kind One that completely eliminates friction and other dissipative forces to maintain motion FOREVEEERRRR (due to its mass inertia)
which law of therm. explains that the total amount of energy and matter in the Universe remains constant, merely changing from one form to another first law
Which law of therm. states that in all energy exchanges, if no energy enters or leaves the system, the PE of the state will always be less than that of the initial state (ENTROPY) second law
T or F: an important goal of thermodynamics is to predict if a rxn or process is spontaneous or not True
Define Gibbs Free Energy/Gibbs Function Usuable energy available to do work
What are standard conditions? 25C (298.15K), 1atm, ph7
What are the favorable values of enthalpy and entropy? Enthalpy (-dH) and Entropy (+dS)
What are the unfavorable values of enthalpy and entropy? Enthalpy (+dH) and Entropy (-dS)
What is the value of 4.184 KJ/mol in kcal/mol 1 kcal/mol
Are entropy and enthalpy state functions or process functions? State Funcitons!
Describe state functions: Path independent (describe the state irrespective of how the system arrived in that state)
Created by: savelae