Strike puts, increase

Finally, a striking property of metal-ammonia solutions is the large expansion of the liquid due to the solvated electrons. The apparent volume of the solvated electron remains roughly constant up to the metallic range, then shows a slight increase. It is about 100 cm3 mol. It is this effect that has led to the hypothesis that the electron forms a cavity for itself a cavity of radius 3.2 A accounts quantitatively for the excess volume. A model in which the electron moves in a cavity, and the surrounding liquid is polarized or solvated as it is round a cation, was first put forward by Jortner (1959), who showed that it was able to account for the absorption spectrum. Jortner s model, as modified by Mott (1967), Cohen and Thompson (1968) and Catterall and Mott (1969), will now be described. 

It is striking that the chemical potential falls more and more steeply with increasing temperature. Except for a very few exceptions of dissolved substances (e.g., Ca jw), all substances exhibit this behavior. The tendency of a substance to transform generally decreases when it is put into a warmer environment. 

When man Hved in caves, every day was an exercise in disaster planning and recovery. There were no AU Cave News stations for predator reports. The National Weather Service was not around yet to warn about rain that might put out the community camp fire. We Hve in an increasingly interdependent information-driven society. Modem information systems managers have an absolute social, technical, and economic responsibility to get information to the public when disaster strikes. Designers of these facilities must do their part to build workplaces that wiU meet the special needs of the Hfehne information mission during major emergencies. 

If some iodine crystals are put into a flask, which is then stoppered and allowed to stand at room temperature, it will soon be seen that the gas in the flask has become violet in color, showing that a quantity of iodine has evaporated. After a while it will be evident that the process of evaporation has apparently ceased, because the intensity of coloration of the gas will no longer increase, but will remain constant. This steady state is reached when the concentration of gas molecules becomes so great that the rate at which gas molecules strike the crystal surface and stay there is just... 

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