Please correct answer and don't use hend raiting 2. Hydrogen iodide, HI(g), decomposes into hydrogen, H2(g), and iodine,12(g), when it is irradiated with 207 nm light. If the irradiation is donewith a 90 W lamp (100 % efficiency) for 0.01s, 442.8 μg of HI aredecomposed. What is the approximate integer quantum yield for thedecomposition of HI in this process?A) 3(1W = 1 J/s and molar mass of HI = 127.9 g/mol)B) 1C) 2D) 7E) 4

1. Calculate the energy of the photons:The wavelength of the light is 207 nm.Use the formula E = hc…

Answered: 2. Hydrogen iodide, HI(g), decomposes…

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter20: Molecular Spectroscopy And Photochemistry

Section: Chapter Questions

Problem 49P

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Photobromination of cinnamic acid to dibromocinnamic acid was carried out in blue light of wavelength 440nm at 35degree celsius using light intensity of 1.5 *10 power -3 joule per second. An exposure of 20 minutes produces a decrease of 0.075 millimoles of bromine. The solution absorb 80% of light passing through it. Calculate the quantum yield of the reaction.
(c) The kinetic energy, KE, of electrons emitted from a metal surface after irradiation with UV light of wavelength A is given by: hc Kε = 7-9 where h is Planck's constant (6.626 x 10-4 Js), c is the speed of light in a vacuum (2.99 x 108 m s¹), and is the work function of the metal surface. In a specific experiment, light with a wavelength of 266 nm was used to irradiate a cadmium (Cd) metal surface. Calculate the photon energy of the light used in the experiment, in Joules. (1) ₂4
Compare the energy (in joules) carried by an X-ray pho- ton (wavelength A = 0.20 nm) with that carried by an AM radio wave photon (A = 200 m). Calculate the 1.00 mol of each type of photon. What effect do you expect each type of radiation to have for inducing chemi- cal reactions in the substances through which it passes? energy of
Match each statement with one or more of the following: flame AA, flame photometry, atomic fluorescence, ICP, graphite furnace AA, and spark emission. (a) The technique that uses a partially ionized stream of argon gas called a plasma - (b) The technique in which a light source is used to excite atoms, the emission from which is then measured - (c) The three techniques that require light to be directed at the atomized ions - (d) The technique that utilizes a solid sample - (e) The four techniques that measure some form of light emission by excited atoms present in an atomizer - (f) The absorption technique in which the atoms are in the path of the light for a relatively short time - (g) The technique in which the emitting source may reach a temperature of 6000 K -
2.9 Vibrations in crystals. (a) Calculate the average vibrational energy per mole for Si at 400 K to within the limits of the Einstein theory. Let VẸ = 12 x 1012 s-1, (b) If each atom carried three quanta of vibrational energy, how much vibrational energy would the crystal contain?
(c) The kinetic energy, Kr, of electrons emitted from a metal surface after irradiation with UV light of wavelength λ is given by: hc K₁=-=- where h is Planck's constant (6.626 x 10-4 Js), c is the speed of light in a vacuum (2.99 x 108 m s¹), and is the work function of the metal surface. In a specific experiment, light with a wavelength of 266 nm was used to irradiate a cadmium (Cd) metal surface. (i) Calculate the photon energy of the light used in the experiment, in Joules. (II) The work function for cadmium is 4.08 eV. Calculate the kinetic energy of the emitted electrons. [Note: 1 eV = 1.60 x 10-19 J.)
What are the advantages and disadvantages of using quantum dots for fluorescence imaging?
Why is 800nm used for the wavelength when measuring the absorbance of the blue copper II sulfate solution?
Constants: • c = 2.9979 x 108 m/s • h = 6.626 x 10-34 J s per one photon • R = 8.314 J/(K mol) = 0.08206 Latm/(K mol) = 6.022 x 1023 particles/mol NA = RH = 1.097 x 107 m1 = 2.178 x 10-18 J . You conduct a Photoelectric Experiment and shine light with a wavelength of 5.34 x 10-7 meters onto a metal surface. Electrons are ejected with a Kinetic Energy of 79.0 kJ/mol. What is the Binding Energy (in kJ/mol) for the metal?
2. Predict the energy of the 2p electrons in K. [k = 13.6 ev and Szp = 2.579 + 0.333(2p - 1) – 0.0773(3s) - 0.0161(3p + 4s) - 0.0048(3d) + 0.0085(4p)]
The quantum yield of light-induced chemical reactions (called photochemical reactions) measures the efficiency of the process. The quantum yield, d, is defined 4, as: number of reaction events number of photons absorbed Suppose the quantum yield for the reaction CH;X - CH3 + X is =0.24. A cuvette con- taining a solution of CH3X is irradiated with 280-nm light with a power of 885 mW for 10.0 minutes. Assuming total absorp- tion of the light by the sample, what is the maximum amount (in moles) of CH3X that breaks apart?
(V) Consider solid and liquid samples of equal mass and heat capacity. If microwaves are fired at both samples, which one will increase in temperature faster? (VI) Using the Heisenberg uncertainty principle, calculate the frequency spread Av for a nanosec- ond (10-9 s) pulse from a CO2 laser, in which the nominal photon energy is hv = 0.112 eV.

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