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Many of us are delighted to be able to refer our students to the Oxford Chemistry
Primers for an intermediate-level treatment of a modern topic not found in introductory
textbooks. Foundations of Physics for Chemists by Ritchie and Sivia is,
unfortunately, a misguided and flawed addition to this otherwise fine series.
The Editor’s Foreword presents this work as “…[an] introductory
physics text specifically targetted at chemistry students…”.1
The authors’ Preface presents it as a “…primer …covering
those aspects of physics which are essential knowledge for practicing chemists.”1
Oxford University Press promotional materials2 further
claim “This presents the fundamental physics required for a full understanding
of a diverse range of chemical phenomena and techniques…”.1
Thus, this little (87-page) book purports to instruct, fundamentally and comprehensively
at the introductory level, the physics necessary for chemistry students. These
are preposterous claims and the task set for the authors is as futile as would
be a Foundations of Chemistry for Biologists (in 87 pages) that should
instruct comprehensively on stoichiometry, solutions and chromatography, acid–base
theory, pH and buffers, electronic structure of atoms and molecules, free energy,
and kinetics, together with the organic and biochemistry relevant to the study
of biology—all presuming no prior knowledge of chemistry!
The mathematical level varies from simple algebra to advanced calculus and
vector concepts. Undergraduate chemistry students (at least U.S. undergraduates)
who need a physics “primer” are not prepared for such mathematical
sophistication and terseness as “…resembles the locus of a complex
number in an Argand diagram whose modulus is fixed but has an argument
which is increasing steadily.” or “…because then a quadratic
Taylor series expansion of the potential energy (proportional to x2,
or parabolic) about the position of equilibrium will be a good approximation to
the Lennard-Jones type of potential energy (x-12-x-6)
around the minimum.”
Attempts to be broad and comprehensive within the page limits of this series
necessarily result in simplifications and occasional outright misrepresentations
as in the first (18-page) chapter on Classical Mechanics where, in a concluding
section on relativistic mechanics, it is stated (not just implied) that “…the
consequences of special relativity can also be stated in more physical
terms. There is a length-contraction along the direction of motion…,”1
rather than correctly presenting the so-called Lorentz contraction as a frame-of-reference
artifact.
The first two chapters on Classical Mechanics and Waves and Vibrations are
followed by a chapter on Quantum Mechanics “…[because] we feel students
should become acquainted with these concepts as early as possible because quantum
mechanics underpins much of modern chemical theory”.3
Eight of the eleven and one-half pages devoted to Quantum Mechanics treat the
historical foundations—ultraviolet catastrophe, Planck’s law, heat
capacities, the photoelectric and Compton effects, Thomson, Rutherford, and the
de Broglie/Bohr atom—leaving one and one-half pages for “more formal
quantum mechanics,” one page for the particle-in-a-box, one paragraph for
relativistic quantum mechanics, and one-half page for “unresolved issues
of quantum mechanics.” The only chemical application of quantum mechanics
mentioned is one sentence at the end of the particle-in-a-box section: “One
example is the reddish colour of organic molecules with an extensive chain of
conjugated bonds; a notable example is β-Carotene found in carrots.”
There is no mention that the particles under consideration are electrons or of
the “delocalized” model of electrons in conjugated bonds. It is difficult
to see how this treatment of quantum mechanics could contribute significantly
to a student’s understanding of chemistry.
Chapter 4, Kinetic Theory of Gases, treats the KMT basis for pressure, the
Maxwell-Boltzmann velocity and speed distributions, collision theory, and transport
properties at an appropriate level—just above many introductory physics
and chemistry texts yet below the full treatment of physical chemistry texts.
Chapter 5, Electrostatics, probably meets its purpose better than any other by
adhering to a consistent mathematical level (algebra) and treating chemical topics
that are not adequately covered in standard physics texts—the Madelung ionic
model of crystal lattices, and a very comprehensible treatment of the several
types of electric dipole interactions of atoms and molecules. Chapter 6, Electromagnetism,
is a fairly standard physics-text treatment of the topic concluding with one page
on NMR and the Zeeman effect as the basis for understanding magnetic quantum numbers
and selection rules (but applied only to the atomic spectrum of helium—hardly
a current or essential topic).
The final chapter, Optics, is especially hard to justify, both in the uneven
mathematical sophistication it assumes and the selection of topics. Beginning
with Maxwell’s differential equations for the E and B
fields in a vacuum whose solutions involve wave vector dot products and the Poynting
vector for energy flux as a cross product, the rest of the chapter treats Snell’s
laws of refraction and reflection, Fermat’s principle of least time, interference,
and diffraction using only simple algebra and geometry. Surprisingly, the chapter
fails to mention the absorption or emission of radiation by atoms and molecules
or, even in passing, lasers—especially since the authors make a point in
their preface that “…a thorough grounding in the area [optics] is
necessary for a proper understanding of the many laser based techniques used in
modern physical chemistry.”
I have tried to imagine a context in which this “text” would be
useful; I have difficulty finding one. Undergraduate chemistry students possessing
the requisite mathematical sophistication will almost surely have gained such
in a full-year course in introductory physics and, thus, have no need for this
book.
Could it serve as a primer on a particular topic rather than all of physics?
For kinetic theory of gases or electrostatics, yes; for the other topics, it is
doubtful.
Could it serve as a review for a student facing an examination in physics?
Hardly. On the one hand, it is introductory and expository rather than summative;
on the other, the coverage of any topic is insufficient in depth.
In an attempt to extend a fine series, the publisher has failed to apply sound
editorial judgment. I cannot recommend adding this volume to your personal or
institutional library.
Notes
- Emphasis has been added by this reviewer.
- Promotional materials and other publisher’s information
are available online.(accessed
Nov 2002)
- Quoted from Authors’ Preface.
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