Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
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Chapter 6, Problem 6.10QAP
Interpretation Introduction
Interpretation:
Wien displacement law should be used to calculate the wavelength of maximum emission for a Globalinfrared source operated at
Concept introduction:
Wien displacement law states that for blackbody radiators, the multiplication of temperature (in K) and the wavelength of maximum emission is a constant;
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Chapter 6 Solutions
Principles of Instrumental Analysis
Ch. 6 - Prob. 6.1QAPCh. 6 - Calculate the frequency in hertz, the energy in...Ch. 6 - Calculate the frequency in hertz, the wavelength...Ch. 6 - Prob. 6.4QAPCh. 6 - Prob. 6.5QAPCh. 6 - Prob. 6.6QAPCh. 6 - What is the wavelength of a photon that has three...Ch. 6 - The silver bromide bond energy is approximately...Ch. 6 - Cesium is used extensively in photocells and in...Ch. 6 - Prob. 6.10QAP
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- In high-temperature sources, sodium atoms emit a doublet with an average wavelength of 1139 nm. The transition responsible is from the 4s to 3p state. Set up a spreadsheet to calculate the ratio of the numberof excited atoms in the 4s state to the number in the ground 3s state over the temperature range from anacetylene-oxygen flame (3000°C) to the hottest part of an inductively coupled plasma source (8750°C).arrow_forward1. Draw simple atomic energy level diagrams showing the following processes: Atomic Absorption Atomic Emission Atomic Fluorescence 2. Explain what a nebulizer is and what it does. 3. Why is an inductively-coupled plasma generally a better tool for atomic emission than a flame?arrow_forwardThe intensity of the radiation from an object is found to be a maximum at 2000 cm−1. Assuming that the object is a black body, calculate its temperature.arrow_forward
- Compare and contrast Flame Emission Spectrophotometry and Atomic Absorption Spectrophotometryarrow_forwardIn the Balmer spectrum of a hydrogen discharge lamp, the ratio of the intensities of the lines originating from levels n=3 and n=4 is 150/1. Estimate the temperature of the discharge gas, using the Boltzmann formula: Ni/Nj = (gi/gj)exp[-(Ei-Ej)/kT]. Where Ni is the originating energy level, gi is the degeneracy of the ith level (having principle quantum number n=i; so, for i = 1, g1 = 1, for i = 2, g2=4, for i = 3, g3= 9, etc.) and Ei is the energy of the ith level.arrow_forwardThe Wien displacement law states that the wavelength maximum in micrometers for blackbody radiation isgiven by the relationship maxT=2.90103 where T is the temperature in kelvins. Calculate the wavelength maximum for a blackbody that has been heated to (a) 4500 K, (b) 250 K, and (c) 1250 K.arrow_forward
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