Read e-book online A system of physical chemistry. Kinetics PDF

By Lewis

ISBN-10: 2152164164

ISBN-13: 9782152164168

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1-4. E = hv. E ~ 0 and Eis essentially continuous. £ ~ 0. 1 as v ~ 0. ) Problems 37 vi Hz. Radio w~lves Nlicrowaves "g Shortwave radio TV 10~ 10' ~ " ~ ~ Ill 5 :: > ~ X rays y rays 10' J... 19 The regions of electromagnetic radiation. 1-5 . 90 x 10-3 m·K where Amax is the wavelength at which the blackbody spectrum has its maximum value at a temperature T . 3 with respect to A. Hint: Set hc/AmaxkBT = x and derive the intermediate result e-x + (x / 5) = L This equation cannot be solved analytically but must be solved numerically.

What temperature is needed so that Amax = 550 nm? 1- 18. The threshold wavelength for potassitun metal is 564 run . What is its work function? What is the kinetic energy of electrons ejected if radiation of wavelength 410 nm is used? 1- 19. 40 eV, calculate the kinetic energy of electrons emitted from a chromium surface that is irradiated with ultraviolet radiation of wavelength 200 nm. 1- 20. 805 eV Calculate the work function and the threshold frequency of silver. 1-21. Some data for the kinetic energy of ejected electrons as a function of the wavelength of the incident radiation for the photoelectron effect for sodium metal are shown below.

Electron microscopes are used routinely in chemistry and biology to investigate atomic and molecular structures. An interesting aside in the concept of the wave- particle duality of matter is that it was J. J. Thomson who first showed in 1895 that the electron was a subatomic particle and it was G. P. Thomson who was one of the first to show experimentally in 1926 that the electron could act as a wave. These itwo Thomsons are father and son. The father won a Nobel Prize in 1906 for showing that the electron is a particle, and the son won a Nobel Prize in 1937 for showing that it is a wave.

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A system of physical chemistry. Kinetics by Lewis


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