Download or read book Ultrasonic Relaxation in Electrolytic Solutions I a Review written by JOHN. STUEHR and published by . This book was released on 1962 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: The available relaxation data for electrolytes is reviewed and critically evaluated. Ultrasonic relaxation theory is reviewed with particular reference to solutions of electrolytes. Specific processes include the relaxation of the ionic atmosphere surrounding ions in solution, and unimolecular and dissociation reactions. The theoretical treatment of the multiple relaxation effects associated with consecutive equilibria is reviewed. Eigen (1958-61) has shown that the observed acoustic absorption data in divalent sulfates can be explained on the basis of the step-wise loss of hydration water from between the partners of cation-anion ion pairs. This mechanism is used to examine critically the ultrasonic absorption data in solutions of divalent sulfates, thiosulfates, and chromates. A number of proton-transfer reactions (e.g. hydrolysis or acid-base dissociation) have been studied by several relaxational techniques. Rate constants for reactions between ions in aqueous solution approach the theoretical limiting values anticipated for primarily diffusion-controlled processes. Representative values are collected and discussed in relation to the mechanisms responsible for the relaxation effects. A brief survey of experimental methods for measuring ultrasonic absorption is given in an appendix. (Author).

Download or read book Light Scattering and Ultrasonic Investigations of Relaxation in Aqueous Solutions written by Theodore A. Litovitz and published by . This book was released on 1969 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research and Development Progress Report written by United States. Office of Saline Water and published by . This book was released on 1969 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of Relaxation in Electrolytic Solutions Using Ultrasonic and Laser Light Scattering Techniques written by Klaus Fritsch and published by . This book was released on 1968 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Pressure on Ultrasonic Relaxation in Electrolytes written by Edmund H. Carnevale and published by . This book was released on 1958 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ultrasonic Absorption in Electrolytic Solutions written by Leroy George Jackopin and published by . This book was released on 1969 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: The kinetics of fast reactions in solution have been studied by means of ultrasonic relaxation techniques. The rate constants for a simple ionization-association process (acetic acid) were determined from ultrasonic absorption measurements and found to compare favorably with those evaluated by other methods (Wren effect II, electrochemical). Ultrasonic relaxation has been re-examined in a 2-2 electrolyte (MnSO4) in order to resolve discrepancies in published data. The new results are in good agreement and complement data recently published by the ultrasonic groups at Gottingen and Heidelberg. A non-linear regression technique developed as part of the present research, has been used to analyze these data. Two relaxation frequencies are adequate to describe these data if the non-relaxing absorption component is treated as an adjustable parameter (in contrast to the three or four relaxation frequencies reported earlier by other groups). Ultrasonic relaxation has also been studied in CdI2 solutions and compared with NMR data. (Author).

Download or read book Effect of Pressure on Ultrasonic Relaxation in Electrolytes A Dissertation Etc written by Edmund H. CARNEVALE and published by . This book was released on 1958 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ultrasonic Relaxation in Electrolytic Solutions Ii the Hydrolysis of Potassium Cyanide written by JOHN. STUEHR and published by . This book was released on 1962 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: The kinetics of the hydrolysis of the cyanide ion have been studied by ultrasonic absorption measurements over the frequency range 30 kc to 25 mc. A single relaxation frequency has been observed which depends on concentration in the manner expected theoretically for the hydrolysis reaction. The relaxation frequency at 25 C is 450 kc for a 0.01 M solution and 950 kc for 0.05 M. The corresponding forward and reverse rate constants calculated for the reaction (CN ion + H2O equals HCN + OH ion) are K sub 1 equals 5.2 x 10 to the 4th power per sec and K sub minus 1 equals 3.7 x 10 to the 9th power at 25 C. From the magnitude of the maximum excess acoustic absorption per wavelength (90 x 10 to the minus 6th power at 25 C for the 0.05 M solution) the partial molal volume change delta V for the process was calculated as -12.4 cu cm/mol. The temperature dependence of the relaxation frequency indicates an energy of activation for the process HCN + OH ion yields CN ion + H2O of 6! 2 Kcal/mol. (Author).

Download or read book Keywords Index to U S Government Technical Reports written by United States. Department of Commerce. Office of Technical Services and published by . This book was released on 1962 with total page 990 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Keywords Index to U S Government Technical Reports permuted Title Index written by United States. Department of Commerce. Office of Technical Services and published by . This book was released on 1962 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ULTRASONIC STUDIES OF ELECTROLYTES written by Ernest Yeager and published by . This book was released on 1965 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: Important developments which have occurred in the application of ultrasonic techniques to the study of the structure and dynamic properties of electrolytic solutions during recent years are discussed with principal emphasis on ultrasonic relaxation and electrical effects attending the propagation of sound waves through such solutions. Sufficient understanding of the various relaxation processes in electrolytic solutions now has been attained that the relaxation frequencies and excess relaxation absorption can often be predicted in advance of ultrasonic measurements from other data. In contrast measurements of the electrical effects, particularly ionic vibration potentials, are still rather uncertain because of the possible superposition of several acoustical effects, and measurements of really quantitative significance are only now becoming available for the most part. (Author).

Download or read book The Journal of the Acoustical Society of America written by Acoustical Society of America and published by . This book was released on 1963 with total page 982 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Reviews in Chemistry written by and published by . This book was released on with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Chemical Reviews written by and published by . This book was released on 1959 with total page 878 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soviet Physics written by and published by . This book was released on 1983 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pandex Current Index to Scientific and Technical Literature written by and published by . This book was released on 1970 with total page 1404 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electrospun Nanofibers written by Mehdi Afshari and published by Woodhead Publishing. This book was released on 2016-09-13 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrospun Nanofibers covers advances in the electrospinning process including characterization, testing and modeling of electrospun nanofibers, and electrospinning for particular fiber types and applications. Electrospun Nanofibers offers systematic and comprehensive coverage for academic researchers, industry professionals, and postgraduate students working in the field of fiber science. Electrospinning is the most commercially successful process for the production of nanofibers and rising demand is driving research and development in this field. Rapid progress is being made both in terms of the electrospinning process and in the production of nanofibers with superior chemical and physical properties. Electrospinning is becoming more efficient and more specialized in order to produce particular fiber types such as bicomponent and composite fibers, patterned and 3D nanofibers, carbon nanofibers and nanotubes, and nanofibers derived from chitosan. - Provides systematic and comprehensive coverage of the manufacture, properties, and applications of nanofibers - Covers recent developments in nanofibers materials including electrospinning of bicomponent, chitosan, carbon, and conductive fibers - Brings together expertise from academia and industry to provide comprehensive, up-to-date information on nanofiber research and development - Offers systematic and comprehensive coverage for academic researchers, industry professionals, and postgraduate students working in the field of fiber science