Odour sampling 1: Physical chemistry considerations

The selection of an odour sampling device may influence the composition of the resulting odour sample. Limited comparison of emission rates derived from turbulent and essentially quiescent sampling devices confirms that the emission rates derived from these devices are quite different. There is therefore compelling evidence that current odour sampling practice should have greater regard for fundamental physical and chemical principles, the nature of the odour source and the conditions created by the sampling device. Such consideration may identify the most appropriate situations under which the use of these devices may or may not be correct.

Physical chemistry of mixed conducting zirconia ceramics

Suivant la pression partielle d'oxygène, la zircone peut être conducteur ionique ou électronique. Mise au point de méthodes de mesures de f.é.m. permettant de s'affranchir des sources d'erreur introduites par ces propriétés.

Physical chemistry of the reduction of calcium oxide with aluminium in vacuum

The physical chemistry of "aluminothermic" reduction of calcium oxide in vacuum is analyzed. Basic thermodynamic data required for the analysis have been generated by a variety of experiments. These include activity measurements in liquid AI-Ca alloys and determination of the Gibbs energies of formation of calcium aluminates. These data have been correlated with phase relations in the Ca-AI-0 system at 1373 K. The various stages of reduction, the end products and the corresponding equilibrium partial pressures of calcium have been established from thermodynamic considerations. In principle, the recovery of calcium can be improved by reducing the pressure in the reactor. However,, the cost of a high vacuum system and the enhanced time for reduction needed to achieve higher yields makes such a practice uneconomic. Aluminum contamination of calcium also increases at low pressures. The best compromise is to carry the reduction up to the stage where 3CaO-Al,O, is formed as the product. This corresponds to an equilibrium calcium partial pressure of 31.3 Pa at 1373 K and 91.6 Pa at 1460 K. Calcium can be extracted at this pressure using mechanical pumps in approximately 8 to 15 hr, depending on the size and the fill ratio of the retort and porosity of the charge briquettes.

Copyright Free Images - Physical Chemistry

These images have been created for use in Physical Chemistry slides to overcome copyright issues when recording lectures. They are free to use without restrictions, although we do not accept responsibility for any errors in the images. Please let us know if you spot any errors, though! Please view the catalogue document for a description of the images. We intend to add to this collection on an ongoing basis. Check back for updates. Current content - 43 images. Last update: August 31st 2011

Introductory Physical Chemistry Lecture 1

These lectures are designed to show new students different lecturing styles they will encounter at Southampton University. This lecture is in the style of 'Chalk and Talk'. The lectures also teach students some of the fundamental parts of physics which are relevant to the Physical Chemistry course. This will be particularly useful for students who have forgotten their GCSE physics! To view the videos, download the zip file and 'extract' the contents by right clicking on the folder. Then double click on the file 'Play video.html'. Note that the video has been compressed heavily so it can be downloaded, which means there is a slight loss in quality. If you have a problem with this, please e-mail David Read (d.read@soton.ac.uk). NOTE: YOU MUST EXTRACT THE ZIP FOLDER BEFORE CLICKING ON 'Play video.html' OTHERWISE IT WON'T WORK.

Introductory Physical Chemistry Lecture 2

These lectures are designed to show new students different lecturing styles they will encounter at Southampton University. This lecture is delivered using a Tablet PC. These lectures also teach students some of the fundamental parts of physics which are relevant to the Physical Chemistry course. This will be particularly useful for students who have forgotten their GCSE physics! To view the videos, download the zip file and 'extract' the contents by right clicking on the folder. Then double click on the file 'Play video.html'. Note that the video has been compressed heavily so it can be downloaded, which means there is a slight loss in quality. If you have a problem with this, please e-mail David Read (d.read@soton.ac.uk). NOTE: YOU MUST DOWNLOAD AND EXTRACT THE ZIP FOLDER BEFORE CLICKING ON 'Play video.html' OTHERWISE IT WON'T WORK.

Introductory Physical Chemistry Lecture 3

These lectures are designed to show new students different lecturing styles they will encounter at Southampton University. This lecture is delivered using PowerPoint. These lectures also teach students some of the fundamental parts of physics which are relevant to the Physical Chemistry course. This will be particularly useful for students who have forgotten their GCSE physics! To view the videos, download the zip file and 'extract' the contents by right clicking on the folder. Then double click on the file 'Play video.html'. Note that the video has been compressed heavily so it can be downloaded, which means there is a slight loss in quality. If you have a problem with this, please e-mail David Read (d.read@soton.ac.uk). NOTE: YOU MUST DOWNLOAD AND EXTRACT THE ZIP FOLDER BEFORE CLICKING ON 'Play video.html' OTHERWISE IT WON'T WORK.

Quantities, units and symbols in physical chemistry, 3rd edition

The first IUPAC Manual of Symbols and Terminology for Physicochemical Quantities and Units (the Green Book) of which this is the direct successor, was published in 1969, with the object of 'securing clarity and precision, and wider agreement in the use of symbols, by chemists in different countries, among physicists, chemists and engineers, and by editors of scientific journals'. Subsequent revisions have taken account of many developments in the field, culminating in the major extension and revision represented by the 1988 edition under the simplified title Quantities, Units and Symbols in Physical Chemistry. This 2007, third edition, is a further revision of the material which reflects the experience of the contributors with the previous editions. The book has been systematically brought up to date and new sections have been added. It strives to improve the exchange of scientific information among the readers in different disciplines and across different nations. In a rapidly expanding volume of scientific literature where each discipline has a tendency to retreat into its own jargon this book attempts to provide a readable compilation of widely used terms and symbols from many sources together with brief understandable definitions. This is the definitive guide for scientists and organizations working across a multitude of disciplines requiring internationally approved nomenclature.