DOC PREVIEW
UT Arlington CHEM 1465 - Important Terms

This preview shows page 1 out of 4 pages.

Save
View full document
View full document
Premium Document
Do you want full access? Go Premium and unlock all 4 pages.
Access to all documents
Download any document
Ad free experience
Premium Document
Do you want full access? Go Premium and unlock all 4 pages.
Access to all documents
Download any document
Ad free experience

Unformatted text preview:

Chem 1465 1st Edition Lecture 15Outline of Last Lecture 1. Carbon2. Condensed phases- crystallineA. Packing of spheres 3. Condensed phases- amorphous4. Unit cell5. Coordination number 6. Metallic bonding7. PolymersA. DefinitionsB. Wallace CarothersC. Two monomersD. Polymer stereochemistryE. Degree of polymerizationOutline of Current Lecture 1. Important terms2. UnitsA. JoulesB. calorieC. Calorie3. First law of thermodynamicsA. First lawB. Algebraic expression4. Sign convention A. DeltaThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.B. System and surrounding5. CalorimetryA. TermsB. Equations 6. Pressure-volume work- Many chemical reactions are carried out in an open container under constant pressure conditions. This type of work is called pressure-volume work or pv work.- Definition: w = F x D- Definition: P = F/A- Rearrange: F = P x A- Substitute: w = P x A x D- For a cylindrical piston: w = -p x Δv and A x ΔH= Δv - Under constant volume conditions: w = 0Current Lecture1. Important terms- Thermodynamics: the study of energy and its transformations- Thermochemistry: the study of the relationship between chemical reactions and energy- Energy: the capacity to do work- Heat: the flow of energy caused by temperature difference- Work: the result of a force acting through distance; work = force x distance - Kinetic energy: the energy associated with the motion of an object- Potential energy: stored energy; energy due to position or composition- Thermal energy: energy associated with the temperature of a substance- Chemical energy: energy associated with the relative positions of electrons and the nuclei in atoms and molecules; chemical energy is a form of potential energy- System: that part of the universe that we single out for study- Surroundings: everything else in the universe- Internal energy of the system: the sun total of all of the kinetic and potential energy of every particle in the system- State function: a property of a system that is determined by specifying the state and condition of the system. State function is independent of the history of the system or the pathway followed by system2. UnitsA. Joule (J) - 1 joule= 1kg m2 / s2 - Example: what is the kinetic energy of a 2 kg ball moving at a velocity 1m/s?Ek=1/2 mv2 = 1/2(2)(1) = 1 jouleB. calorie (cal)- one calorie is the amount of heat required to raise the temperature of 1 gramof water by one degree Celsius- 4.184J exactlyC. Calorie (Cal)- 1 Cal = 1 Kilocalorie or 1000 calories- Used for dietary purposes3. First law of thermodynamics A. First law:- There is no free lunch- Energy is conserved- Energy can be converted from one form to another, but cannot be created ordestroyed- Total energy of the universe is constant- Law of conservation of energy- You can never win, only break evenB. Algebraic expression- ΔE = q + w - Where q is heat and w is work- Heat and work are NOT state functions4. Sign conventionA. Delta - ΔX means Xfinal – XinitialB. The sign is determined from the point of view of the system- If q is positive, then the system gains heat- If q is negative, then the system loses heat- If w is positive, then work is done by surroundings on the system- If w is negative, the system does work on the surroundings5. Calorimetry A. Terms - Calorimetry: measure of heat flow- Calorimeter: instrument that measures heat flow- Bomb calorimeter: at constant volume; ΔE=qv- Coffee cup calorimeter: at constant temperature; ΔH=qc- Heat capacity: the amount of heat required to raise temperature of a substance by one degree Celsius- Specific heat capacity (c): the amount of heat required to raise temperature of 1 gram of a substance by one degree Celsius- Molar heat capacity: heat capacity of 1 moleB. Equation- q=


View Full Document

UT Arlington CHEM 1465 - Important Terms

Download Important Terms
Our administrator received your request to download this document. We will send you the file to your email shortly.
Loading Unlocking...
Login

Join to view Important Terms and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Important Terms 2 2 and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?