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Chemistry 104B

Chemistry 104B. Dr. Christine Yerkes 207 Chem Annex 333-6353 cyerkes@illinois.edu Mon. and Wed. 1:00 - 2:00 Tues. and Thurs.11:00 - 12:00 or by appointment. Required Texts:. Chemistry, 8th ed., Zumdahl. Recommended text: Organic Chemistry: a Short Course 13 th ed., Hart, Crane, Hart.

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Chemistry 104B

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  1. Chemistry104B Dr. Christine Yerkes 207 Chem Annex 333-6353 cyerkes@illinois.edu Mon. and Wed. 1:00 - 2:00 Tues. and Thurs.11:00 - 12:00 or by appointment

  2. Required Texts: Chemistry, 8th ed., Zumdahl Recommended text: Organic Chemistry: a Short Course 13th ed., Hart, Crane, Hart I-Clicker Quiz sections begin: Monday, Jan. 24

  3. Grading Policy: On-line Homework: 70 pts. Quiz score: 150 pts. I > clicker 30 pts. Hour Exams (3 x 150) 450 pts. Final Exam 300 pts. 1000 pts. No make-up quizzes or exams

  4. Grades 1000 points total 97-100% (970 - 1000) = A+ 93 - 96% (930 - 969) = A 90 - 92% (900 - 929) = A- 87 - 89% (870 - 899) = B+ 83 - 86% (830 - 869) = B 80 - 82% (800 - 829) = B- etc., etc., etc.

  5. Quiz scores: weekly quizzes - material from Lecture and Quiz section Quizzes on LON-CAPA open Wednesday at 5:00 open for 1 week Three tries – 1st worth 15 2nd worth 13.5 3rd worth 12 keep 10 highest 150 points

  6. On-line Homework: 10 Homework assignments on LON-CAPA due dates in the on-line Syllabus and calendar credit for all problems completed by deadline normalized to 70 points

  7. I > clicker 1 point for answering questions during lecture 0.25 points for each correct answer Keep 30 highest scores

  8. Course Homepage http:// www. chem.uiuc.edu Course Web Sites Chem 104B Lon-Capa = net i.d. Password = AD password homepage

  9. Thermodynamics Thermo = heat or energy dynamics = movement - System + Surroundings

  10. Open systems - • mass and energy Closed systems System + • energy Isolated systems Surroundings no exchange

  11. Energy E Internal Energy = E = Kinetic Energy + Potential Energy • energy due tomotion energy due toposition K.E. = 1/2 mv2 P.E.grav = mass x g x height

  12. Kinetic Potential Energy

  13. K.E. K.E. K.E. K.E. total translation vibration rotation Kinetic Energy K.E. = 1/2 mv2 + + =  Temperature (K) K.E.translation degrees of freedom = 3n n = # atoms

  14. K.E. K.E. K.E. K.E. K.E. total translation vibration rotation rotation Kinetic Energy K.E. = 1/2 mv2 + + =

  15. - + Potential Energy  Q1Q2 P.E. r - - charge Q = + + r = distance P.E.total = P.E. n-n + P.E. e-e + P.E. n-e + P.E. IMF - - + +

  16. H C H H O O H H H H H Potential Energy Chemical changes P.E.total = P.E. n-n + P.E. e-e + P.E. n-e + P.E. IMF - - + + CH4  CO2 + 2H2O + 2O2 O=O O=O + O=C=O +

  17. Potential Energychemical changes P.E.reactants P.E.products reactants products ( T ) K.E. P.E. reactants products

  18. P.E.total = P.E. n-n + P.E. e-e + P.E. n-e + P.E. IMF - - + + Potential Energy physical changes chemical changes

  19. Q1Q2 r Potential EnergyPhysical changes Intermolecular forces: ion-ion Na+ Cl- d+ d- H-bond ion-dipole Na+ d- Cl- d+ LDF d+ O=C=O dipole-dipole d- d- d+ d- d+ d-

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