1. Chem.412 – PChem I - Outline Introduction/Basics Review Computer Applications States of Matter First Law of TDMolecular Energies Equilibrium & Spontaneity Quantum Chemistry Entropy – 2 nd /3 rd Laws Equations of State Grade Distrn

2. Introduction: Review of Basics Four Major Principles Mathematical Basics Units Significant Figures. Problem Solving Common Terminology Factor Labels

3. Major Principles of Physical Chemistry Thermodynamics Kinetics Quantum Mechanics Statistical Mechanics

4. Basic SI Units

5. Seven Basic SI Units

6. Units – Examples I

7. Units – Examples II

8. ExponentialPrefixSymbol 10 18 exaE 10 15 petaP 10 12 teraT 10 9 gigaG 10 6 megaM 10 3 kilok 10 2 hectoh 10 1 dekada 10 0 --- 10 -1 decid 10 -2 centic 10 -3 millim 10 -6 micro  10 -9 nanon 10 -12 picop 10 -15 femtof 10 -18 attoa

9. Prefix/Units – Examples

10. Scientific Notation & Identities ± integer± real

11. Scientific Notation & Identities: Examples

13. Rules of Significant Figures Counting zeros Rounding Product/Quotient can have no more sig. Figs. Than numbers with the least sig. Figs. Sum/Difference can have no more decimals than numbers with least decimals. Keep at least one extra digit for intermediate calculations Exact Numbers

14. Rules of Significant Figures: Examples

15. Mathcad Answers

17. Dimensional Analysis Method of calculation utilizing a knowledge of units Conversion factors => simple ratios relating two units Desired unit = given unit  (conversion factor) Dimensional Analysis

18. Examples

19. Density Example The sun is estimated to have a mass of 2x10 36 kg. Assuming it to be a sphere of average radius 6.96x10 5 km, calculate the average density of the sun in units of g cm -3. Mathcad Soln Mathcad w Instructions

21. Stoichiometry Example Determine the number of hydrogen atoms present in 2.56 kg of water.

23. Atmosphere Pressure and the Barometer Pressure Standard atmospheric pressure = 760 mm of Hg 1 atm = 760 mmHg = 760 torr = 101.325 kPa. Graph Demo

26. F12

27. Common Terminology System: Part of universe being studied, set apart by definite boundaries. Surroundings: Medium outside System. Isolated System: No energy or matter transferred between System and Surr. Closed System: Energy transfer between Sys. and Surr. Open System: Energy and Matter transfers between Sys. And Surr. Properties: Quantitative measures of physical quantities ( i.e. pressure and temperature ) Graphical TechniquesGraph Demo

28. Graphical TechniquesGraph Demo

29. Introduction: Review of Basics Four Major Principles Mathematical Basics Units Significant Figures. Problem Solving Common Terminology Factor Labels Graphical Techniques Graph Demo