Chem Lecture #1 Midterm #2 Janurary 28, 2011 Pressure and Gases P-Pressure P = ForceArea P= mm Hg or atm or torr or PSI or P or Barr 80% of the atm is in the lower 1/3 Chem Atm=760 mm of Hg= 760 torr Air is composed of 78% N2 21% O2 1% Trace elements
rms=
Chemistry Lecture #3- Midterm #2 February 2, 2011 Average velocity = 3RTMM , where MM= molar mass and R= 8.021 Steeper slope with Low temperature, high MM, high density Smoother slope with High temperature, low MM, low density A student combusts 114.2g of
Chem Lecture #5 Solid, liquids, gases Inner molecular force (IMF) Inert gas He, Ne, Ar
I. Dispersion force= momentary dipole a. Everything with e- has dispersion force (I) b. Weakest IMF c. This force is greater for Xe than He i. More e- = greater dipole
Chem Lecture #6 IMF Solids IMF applied, determine which molecules have which IMFs. The more IMFs the higher the boiling point. Coulombs law: the force of attraction equals the constant times the product of the charge of the cation and the charge of the an
