PRINCIPLES OF INSTRUMENTAL ANALYSIS
7th Edition
ISBN: 9789353506193
Author: Skoog
Publisher: CENGAGE L
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Chapter 11, Problem 11.2QAP
Interpretation Introduction
Interpretation:
A linear TOF mass spectrometer needs to be compared with an orthogonal TOF instrument. The advantages and limitations of the two geometries needs to be determined.
Concept introduction:
The measurement of time which is taken by a wave, object, or particle to travel the given distance with the help of a medium is called time-of-flight. Time-of-flight mass spectrometry is a technique, which helps in determining the ratio of mass-to-charge of an ion with the help of time-of-flight measurements.
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Using reaction free energy to predict equilibrium composition
Consider the following equilibrium:
2NO2 (g) = N2O4(g)
AGº = -5.4 kJ
Now suppose a reaction vessel is filled with 4.53 atm of dinitrogen tetroxide (N2O4) at 279. °C. Answer the following questions about this system:
Under these conditions, will the pressure of N2O4 tend to rise or fall?
Is it possible to reverse this tendency by adding NO2?
In other words, if you said the pressure of N2O4 will tend to rise, can that
be changed to a tendency to fall by adding NO2? Similarly, if you said the
pressure of N2O4 will tend to fall, can that be changed to a tendency to
'2'
rise by adding NO2?
If you said the tendency can be reversed in the second question, calculate
the minimum pressure of NO 2 needed to reverse it.
Round your answer to 2 significant digits.
00
rise
☐ x10
fall
yes
no
☐ atm
G
Ar
1
Chapter 11 Solutions
PRINCIPLES OF INSTRUMENTAL ANALYSIS
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