Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 31, Problem 31.11QAP
Describe the difference between power-compensated, heat-flux, and modulated DSC instruments.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Percent Transmittance
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
4000
N
Liquid Sample 1
3500
3000
2500
2000
1500
1000
500
Wavenumber (cm³)
Calculate the energies, in Joules, of the v = 0, 1, 2, and 3 vibrational states for HCI (Mosc 2991 cm-1) and 12 (Mosc
= 214.5 cm-1). Make a sketch of the energy levels on the same scale
P1B.1 A rotating slotted-disc apparatus consists of five coaxial 5.0 cm diameter
discs separated by 1.0 cm, the radial slots being displaced by 2.0° between
neighbours. The relative intensities, I, of the detected beam of Kr atoms for
two different temperatures and at a series of rotation rates were as follows:
v/Hz
20
40
80
100
120
I (40 K)
0.846
0.513
0.069
0.015
0.002
I (100 K)
0.592
0.485
0.217
0.119
0.057
Find the distributions of molecular velocities, f(v,), at these temperatures, and
check that they conform to the theoretical prediction for a one-dimensional
system for this low-pressure, collision-free system.
Chapter 31 Solutions
Principles of Instrumental Analysis
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- Calculate the temperature at which qvib 4.0 -.6806 X K 2.5 for nitric oxide. The vibrational wavenumber isỹ = 1876 cm-1.arrow_forwardA sample of pure 1 H79Br gas was analysed using IR and NIR absorption spectrometers. A fundamental vibration at 2575.15 cm–1 and an overtone band at 5022.78 cm–1 were measured. (a) Using this data, calculate the equilibrium oscillation frequency (in cm–1) and the anharmonicity constant ( e x ) for pure 1 H79Br.arrow_forward4. Calculate the Boltzman distribution for this instrument at 20°C. What increase in sensitivity would accrue from switching to a 9T magnet?arrow_forward
- What is the physical origin of the specific selection rule ΔJ= ±1arrow_forwardPlease what molecule is thisarrow_forwardQUESTION 5 The IR, 'H NMR and 1°C NMR spectra of compound P are shown below. The molecular formula for compound P is CsH;NO2. Identify three (3) important absorption peaks on the IR spectrum and indicate the bond and wavenumber associated with each peak. Elucidate the structure of compound P and assign each peak in the 'H and 13C NMR spectra. (Hint: The compound consists of more than one functional group). а. b.arrow_forward
- 1H 11 10 2H 2h 5 3H 3 An IR spectrum, a 13C NMR spectrum, and a ¹H NMR spectrum were obtained for an unknown structure. Draw the structure of this compound. 2 1 ppmarrow_forwardEstimate the centrifugal distortion constant for 79Br81Br, for which ᷉ B = 0.0809 cm−1 and ᷉v = 323.2 cm−1. By what factor would the constant change when the 79Br is replaced by 81Br?arrow_forwardIR - Cyclohexanol 100 90 80 70 60 50 40 30 20 10 4000 3500 3000 2500 2000 1500 1000 500 Wave Number (cm) Band Intensity Assigned to the link Frequency (cm-l) Vibrational mode W M S % Transmittancearrow_forward
- Isoamyl acetate 100 90 80 70 60 50 40 20 10 4000 3500 3000 2500 2000 1500 1000 500 wave number(cm-1) Band Intensity Assigned to the link Frequency (cm") Vibrational mode W M S % de transmittancearrow_forwardoutline the general procedure for determining a substance spectrophotometricallyarrow_forwardFor 1H35Cl molecule, (N1/N0) ratio at 300 K is 6.091 x 10-2. Calculate thewavenumber ( in cm-1) for J=2→J=3 transition in the microwave spectrum of the molecule.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
Principles of Instrumental Analysis
Chemistry
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Cengage Learning
NMR Spectroscopy; Author: Professor Dave Explains;https://www.youtube.com/watch?v=SBir5wUS3Bo;License: Standard YouTube License, CC-BY