#Chem 161-2007 recitation 8th week

#Chem 161-2007 recitation 8th week - CHEMISTRY 161-2007 8th...

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CHEMISTRY 161-2007 8th WEEK RECITATION ANNOUNCEMENTS E-MAIL ATTENDANCE EXAMS Exam II Date: 10/24; 9:40 – 11:00 Location: Sections 23, 25, 29 (and 17) - Hck 101 Coverage: Chapters 3.6 to 6.8 in H&P QUIZZES Recitation Quizzes available after recitation Chem 161-2007 8 th week recitation 1
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PLAN FOR TODAY : • LIGHT AND MATTER • QUANTUM MECHANICS/ WAVE-PARTICLE DUALITY/ PLANCK’S EQUATION/ EINSTEIN’S PHOTOELECTRIC EFFECT/ DEBROGLIE THEOREM • HYDROGEN ATOM AND THE BOHR MODEL Chem 161-2007 8 th week recitation 2
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LIGHT AND MATTER ET: Describe light wave as electromagnetic radiation with a magnetic field, an electric field, and having a speed of 3 x 10 8 m/s. Draw undulating light curve to define λ, υ and amplitude. Relate light to graph on next page. ET: Discuss 3 equations from formula page and show that knowing one parameter gives the other two Wavelength = λ = distance/cycle = distance Frequency = υ = cycles/s = cycles s -1 = s -1 = Hz E photon = h υ ET: Use water waves to show relationship between high frequency and high energy; also use graph on next page. υ = c/λ E = hc/λ h = 6.626 x 10 -34 Js c = 3 x 10 8 m/s DeBroglie theorem: λ= h/mv ET: Wave-particle duality; tie into E = hυ m is the mass in kg v = velocity in meters per second Bohr atom: ΔE = -B((1/n f 2 ) - (1/n i 2 )) B = 2.179 x 10 -18 J Einstein’s photoelectric effect Total Energy = Energy threshold + Energy kinetic Energy total = h υ threshold + h υ kinetic energy Chem 161-2007 8 th week recitation 3
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Chem 161-2007 8 th week recitation 4
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Similar to: CHEM 161- 2002 FINAL EXAM + ANSWERS, prob 6 CHAPTER 7 - LIGHT, ATOMIC STRUCTURE & PERIODIC TABLE TRENDS LIGHT AND MATTER H&P 37mod. Calculate the energy, in joules, of light that has 655-nm wavelength?
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#Chem 161-2007 recitation 8th week - CHEMISTRY 161-2007 8th...

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