Chemistry Exam 1 Review

Chemistry Exam 1 Review - Laude's Chemistry 301 Exam 1...

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Laude’s Chemistry 301 Exam 1 Review 1. Electromagnetic Radiation (EMR) Theory and Calculation (easy) -consists of oscillating (time-varying) electric and magnetic fields that travel through empty space at 3.00 x 10^8 m/s. - SPEED OF LIGHT- c= 3.00 x 10^8 m/s . -different light energies promote different kinds of motion in atoms and molecules: -Radio photons cause nuclear spin -Microwave photons cause rotation -IR photons cause vibrations -Classified by either frequency in Hz (1/sec) or wavelength (meters- picometers) 2. Balmer, Rydberg and atomic spectra theory (easy) -discrete lines were the transition of electrons falling from one energy level (n ) to another n -Lyman series- in the UV region and has a higher energy -Balmer series_ in the Visible region and has a lower energy -Rydberg created an equation which empirically described the transition 3. Rydberg equation calculation (hard) -what I taught you in problem #2 is done as a calculation -be able to easily manipulate E, , and fully understand the 1/n relationship, so relate it back to the picture in #2 -tells you how much energy you have as you move outward 4. Particle in a box theory (medium) -be able to explain the theory to a friend and draw the pictures describing the solution -like a guitar string -V(x)= 0 so Shcrodinger is simplified -the wave functions that solve it fit- only specific wavelengths work
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-E can’t be zero- the uncertainty principle doesn’t permit particles to lose all energy and become fixed. -As L, length of box, increases, ∆E gets smaller which is why when L is macroscopic (we can see it) the energy levels are too small to distinguish -boundary conditions made quantized energy levels (n=1,2,3….) 5. Uncertainty principle calculation (easy) -be able to identify it because it sure looks like problem #1 and #6 -make sure you get your mks and metric system down. -if photons are waves, then we can’t say where a photon is -if you know the momentum then you can’t know the location and vice versa -∆p=momentum -∆x=location 6. deBroglie equation calclulation (easy) -make sure you can tell it from #1,5 -mks and metric system -any moving particle with mass and a velocity has a corresponding wavelength -equation used to calculate the wavelength of a particle -wavelenth= meters - PLANCK’S CONSTANT- h= 6.626 x 10^-34 Js -mass= kg -v=velocity= m/s -most important object is the electron (now as a standing wave when confined to the nucleus) 7. Schrodinger and wave equations: theory (hard) -I will tell you all kinds of things about Schrodinger equation. Some will be true, some won’t, you tell apart -generally explain equations of motion -worked well for really tiny things -wave-particle duality of tiny things
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This note was uploaded on 03/19/2008 for the course CH 301 taught by Professor Fakhreddine/lyon during the Fall '07 term at University of Texas.

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Chemistry Exam 1 Review - Laude's Chemistry 301 Exam 1...

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