CHEM 110 Lecture Notes - Lecture 4: Rydberg Formula, Induced Polarization, Balmer Series

• School: McGill University
• Department: Chemistry
• Course: CHEM 110
• Professor: Laura Pavelka

Document Summary

It is not a molecular property, but an average macroscopic property--heat. If remove fastest molecules in system at intermediate temp. , see redistribution through collisions which lowers temperature (i. e. cooling by evaporation) If remove slowest molecules in the system, see re-distribution through collision which raises average energy and increases temperature: pressure is total force of all individual molecular collision with the wall of container, f=mv/t = mv2/l. P= nmv2/l3 pv = nrt: volume is the response of the container if we allow it to adjust to equilibrium. Molecules with permanent dipole moment are polar. These attractions between molecules serve to reduce pressure. J. j thomson discovered electron in 1897: has charge, mass, location, but no size. Plum pudding" model, a classical and stable system. Louis de broglie proposed that a wavelength really exists for electrons. Single photons: no rest mass, but have energy and can interact with electrons to transfer that energy into acceleration. Light can be used to deduce quantum levels.