close

Вход

Забыли?

вход по аккаунту

?

Book Review Handbook of Chemistry and Physics. Edited by R. C. Weast

код для вставкиСкачать
and +3OoC. The heat of evaporation of NOBr at the boiling
point and under atmospheric pressure is 7.2 kcal/mole. /
Trans. Faraday SOC.65, 2350 (1969) / -Hz.
[Rd 141 IE]
The reaction of NzO with copper surfaces has been studied by
J . J . F. Scholten and J . A . Konvalinka; a surface oxide is
formed and nitrogen is desorbed. The activation energy of
this reaction increases with the degree of covering of the surface. The transition from surface oxidation to internal oxidation involves an incubation time at not too high a temperature.
At 90 “C and 200 torr N20 a coverage degree of 1 [one atom
of 0 per two atoms of Cu) is found. Since further uptake of
oxygen is strongly hindered (activation energy cu. 20 kcal/
mole) this reaction is suitable for the reproducible determination of the areas of free copper surfaces in catalysts./
Trans. Faraday SOC.65, 2465 (1969) / -Hz.
[Rd 142 IE]
BOOK REVIEWS
Handbook of Chemistry and Physics. Edited by R. C. Weast.
49th Edit., The Chemical Rubber Co., Cleveland, Ohio,
1968. 2096 pp., bound, DM 89.80.
It is no simple matter to revise a handbook that has appeared
in 48 editions[*] since 1913. Apart from minor corrections,
most of the data and numerical tables retain their validity for
years on end. At the same time increasing space has to be
found for new material as science progesses and new methods
are developed. The crucial problem therefore becomes the
size of such a work, notwithstanding the use of lightweight
paper. The present 49th edition of the “Rubber Handbook”,
with its total of nearly 2100 pages, is certainly as large as it
could be without becoming unwieldy, and it is gratifying to
learn from the Foreword that the publishers are thinking in
terms of an appreciable reduction in size. Among the measures taken with this in mind is a table, published for the first
time, giving the names of all publishers, institutions, laboratories, erc. having compilations of physical, physicochemical, or chemical data that are not of sufficiently general
interest to be included in the handbook itself. The present
edition does in fact again contain some 200 pages of new
tables, in particular in the following fields: X-ray data for
minerals, wavelengths of characteristic X-rays of elements,
properties of semiconductors, heat capacity of organic compounds, physical properties of pigments and commercial
plastics, density of heavy water, and viscosity of water between 0 and 100OC. A number of tables have been brought
up to date by the inclusion of new data.
The usefulness and reliability of the work have been established beyond doubt over numerous editions. At the same time
one continues to hope for a complete revision of the largest
table in the book (500 pages), i.e. the table giving the physical
properties of organic compounds. In its present form this is
below the standard of the rest of the book with regard to the
presentation of the formulas and the utterly impractical
arrangement of the compounds (even after 20 pages of instructions it is difficult to find a substance, or even to establish
whether it is in fact listed somewhere in the table). Perhaps
the imminent 50th edition may be seen by the publishers as a
suitable occasion for rearranging the whole table, a step
which is in any case desirable from the point of view of saving
space. In all other aspects the handbook is, as always, highly
H. Griinewald IJVB 841 IE]
commendable.
In the section on carbon the author had to face the difficulty
of deciding where to draw the line, for the book would have
been extended indefinitely if it had covered all methods of
organic elemental analysis for all organic compounds. The
choice made was to treat combustion methods relatively
shortly and methods of determining C02 in greater detail. In
addition, special methods (spectral analysis, activation
analysis, X-ray scattering, P-back-scattering) and determination of carbon in many materials (metals, carbides, ores, soils,
etc.) are also discussed. Finally there follow chapters on the
analysis of some simple compounds (hydrocarbons, ethylene
oxide, CO, COS, COClp, HCN, HCNO, HCNS, HCOOH,
CH3COOH, and oxalic acid).
Thematerial on CO and C02 and the chapters on combustion
methods and on the determination of HCN, HCNO, HCNS,
COS, and COCl2 can be seen as particularly valuable reviews and one is very grateful to have these facts collected
from the scattered literature of these compounds. However,
it could be maintained that the “purely organic” compounds should have been omitted; at the least their selection
is arbitrary and their discussion in this book is unexpected.
The section on silicon deals in detail with the determination
of SiOz in silicates and fluorspars and of silicon in metals,
Sic, and organosilicon compounds; gravimetric, titrimetric,
and photometric methods are discussed. It is welcome that
the numerous variants of these procedures have been put
together clearly. It should also be emphasized that many experimental details are given, which greatly increases the value
of this section to the practising chemist.
However, several important methods are missing. That
determination of silicon by atomic absorption or gas chromatography is not mentioned may be because these methods
were perfected after the manuscript was complete; but that
cannot explain the absence of determination by spectrography, X-ray spectral analysis, and activation analysis processes that are not wholly unimportant.
R.Bock
[NB853IE]
Knstailisation. Grundlagen und Technik. (Fundamentals and
Techniques of Crystallization). By G . Matz. SpringerVerlag, Berlin-Heidelberg-New York 1969. 2nd Edit., vii
418 pp., 174 figs., 55 tables, bound DM 72.-.
+
Handbuch der analytischen Chemie (Handbook of Analytical
Chemistry). Edited by W. Fresenius and G. Junder. Part 111:
Quantitative Bestimmungs- und Trennungsmethoden.
(Quantitative Methods of Determination and Separation).
Vol. IV aa: Elemente der vierten Hauptgruppe I: Kohlenstoff, Silicium (Elements of the Fourth Main Group I:
Carbon, Silicon). Compiled by H. Grassmann and W. Prodinger. Springer-Verlag, Berlin-Heidelberg-NewYork 1967.
563 pp., IlOfigs., paperback, DM 153.-;
1st ed., viii
bound DM 158.-.
+
[*] Cf. Angew. Chem. 81, 90 (1969); Angew. Chem. internat.
Edit. 8, 86 (1969).
Angew. Chem. internat. Edit. / VoI. 9 (1970) 1 No. I
The theory and the techniques of crystallization have received
much attention in the past twenty years. As a result, a wide
variety of better single crystals can now be grown, and many
crystalline substances with the required particle size and
particle-size distribution can be obtained on a large scale by
mass crystallization.
While several good books exist on the art of growing single
crystals, this is the first comprehensive and up-to-date book
on mass crystallization. In fact, the book deals mainly with
the designing and the operation of mass crystallizers, and
gives only a sketchy account of the theory and techniques of
growing single crystals.
85
Документ
Категория
Без категории
Просмотров
1
Размер файла
144 Кб
Теги
chemistry, book, physics, handbook, edited, weast, review
1/--страниц
Пожаловаться на содержимое документа