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Chem 300 Thermo/Kinetics

Chem 300 Thermo/Kinetics. www.amey.oxy.edu/chem300. Information Card. Last, First Name (Nickname?) Class yr Phone # e-mail Mail Box # Major? Home City, State, Country? Math Courses Completed Completed Chem 305?. Refer to Manual for:.

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Chem 300 Thermo/Kinetics

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  1. Chem 300Thermo/Kinetics www.amey.oxy.edu/chem300

  2. Information Card Last, First Name (Nickname?) Class yr Phone # e-mail Mail Box # Major? Home City, State, Country? Math Courses Completed Completed Chem 305?

  3. Refer to Manual for: • Syllabus • Homework assignments • Exam dates • Hints for successful studying • Performance Objectives • Chapter hints • and much, much more...

  4. Ch 1/#1Today’s To Do List • Fill out info card • Review P, V, T • Review Ideal Gas Law • The Compressibility Factor • “Real” Equations of State

  5. Concepts of P, V, T • Molecular • Mechanical

  6. Mechanical Equilibrium

  7. Volume • DUH!! • Measure containment dimensions

  8. Thermal Equilibrium

  9. Zeroth Law of Thermo

  10. Zeroth Law of Thermo • When 2 bodies, in intimate contact, no longer show change in their physico-mechanical properties, they are in thermal equilibrium (TE). • When bodies A & B are in TE, and A & C are also in TE, then B & C are in TE.

  11. Properties of simple gases

  12. Boyle’s Law: P = m/V (const T)

  13. Charles’ Law: V = mT (const P)

  14. P = mT (const V)

  15. f = (P,V,T)

  16. Ideal Gas Law • PV = nRT • n = number of mols of gas • R = gas constant • = 0.082058 L-atm/mol-K • = 8.3145 J/mol-K • = V/n = molar volume = Vm • P = RT

  17. IG Assumptions • Point masses • No Attractive forces • Elastic collisions

  18. Examining Reality • Define Compressibility Factor (Z): • Z = PV/nRT = P /RT • For Ideal Gas: Z = 1 • For Nonideal Gases: Z  or  1

  19. Compressibility Factor: Z=PV/nRT

  20. Temperature Dependence of Z • For Ideal Gas: Z(T) = constant • For NonIdeal Gases: • Z(T) is very T-dependent

  21. The Boyle Temperature

  22. Real Gases

  23. Real (Nonideal) Gases

  24. The Critical Point

  25. How do we show this? • Devise a better equation of state by: • Correcting for IG deficiencies. • Curve-fitting experimental data.

  26. Next Time • Equationsof State catchup • More about the Critical State • Law of Corresponding States • Virial Equations • Intermolecular Potentials(Intro)

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