Busy. Please wait.
Log in with Clever

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever

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.
Didn't know it?
click below
Knew it?
click below
Don't Know
Remaining cards (0)
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

Chemistry I Chap 8


Conservation of Energy Law AKA first law of Thermodynamics; energy can be neither created nor destroyed. Thus, the total energy of an isolated system is constant
Endothermic A reaction in which heat is absorbed and the temperature of the surroundings falls
Energy The capacity to do work or supply heat
Enthalpy (H) The quantity E + PV
Enthalpy Change (^H) The heat change in a reaction or process at constant pressure ^H = ^E + P^V
Entropy (S) The amount of molecular randomness in a system
Exothermic A reaction in which heat is evolved and the temperature of the surroundings rises
First Law of Thermodynamics The total internal energy of an isolated system is constant
Gibbs Free-Energy Change (^G) ^G=^H-T^S
Heat The energy transferred from one object to another as the result of a temperature difference between them
Heat Capacity (C) The amount of heat required to raise the temperature of an object or substance a given amount
Heat of Combustion (^H'c) The amount of energy released on burning a substance
Heat of Reaction (^H) The enthalpy change for a reaction ^H
Hess's Law The overall enthalpy change for a reaction is equal to the sum of the enthalpy changes for the individual steps in the reaction.
Internal Energy (E) The sum of kinetic and potential energies for each particle in a system
Joule (J) The SI unit of energy, equal to 1 (kg*m^2)/s^2
Kinetic Energy (Ek) The energy of motion Ek=(1/2)mv^2
Molar Heat Capacity (Cm) The amount of heat necessary to raise the temperature of 1 mol of a substance 1'c
Potential Energy (Ep) Energy that is stored, either in an object because of its position or in a molecule because of its chemical composition
Specific Heat The amount of heat necessary to raise the temperature of 1 gram of a substance 1'c
Spontaneous Process One that proceeds on its own without any continuous external influence
Standard Enthalpy of Reaction (^H') Enthalpy change under standard-state conditions
Standard of Heat Formation (^H'f) The enthalpy change ^H'f for the hypothetical formation of 1 mol of substance in its standard state form from the most stable forms of its constituent elements in their standard states
State Function A function or property whose value depends only on the present condition of the system, not on the path used to arrive at that condition
Sublimination The direct converstion of a solid to a vapor without going through a liquid state.
Temperature A measure of the kinetic energy of molecular motion.
Thermochemistry A study of the heat changes that take place during reactions.
Thermodynamic Standard State Conditions under which thermodynamic measurements are reported 298.15 K (25'c) 1 atm pressure for each gas 1 M concentration for solutions
Work (w) The distance (d) moved times the force (F) that opposes the motion W=d*F
Created by: fenlien
Popular TOEFL sets




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:
restart all cards