This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 Excerpt: ...is vigorously stirred with the stirrer. Usually the water freezes at once; should this not happen, a very small crystal of ice is introduced into the tube A. The thermometer now suddenly rises, since in freezing the latent heat of fusion of the water is liberated. I Finally the temperature reaches a maximum, which ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 Excerpt: ...is vigorously stirred with the stirrer. Usually the water freezes at once; should this not happen, a very small crystal of ice is introduced into the tube A. The thermometer now suddenly rises, since in freezing the latent heat of fusion of the water is liberated. I Finally the temperature reaches a maximum, which lasts for several minutes. This temperature is read from the thermometer and noted as the freezing temperature of the water. The tube A is then held in the hand in order to melt the ice that has formed, and a weighed amount of sugar is introduced into the water through the side tubulation. It is very convenient to let the substance to be dissolved slide through the side neck into the freezingvessel in the form of a pastille. These pastilles can be prepared in a small press especially arranged for this purpose. After the solution has been thoroughly mixed by stirring, the manipulations which have just been described for pure water are repeated, and the freezing-point of the given solution found in this way. By subtraction is obtained the depression which the in greater detail later, in considering the conductivity of dissolved electrolytes. freezing-point of the water has suffered by dissolving the sugar in it. A few remarks concerning the conditions under which a freezing-point determination must be made may not be out of place. Of great importance is the regulation of the temperature of the freezing-mixture. Up to a few years ago, the majority of such determinations were made with great undercooling, that is to say, the freezing-mixture used had a temperature which lay many degrees below that of the freezing temperature of the solution. The observations of Nernst and Abegg, into which we cannot enter here, have shown, however, that through the us...
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Add this copy of Physical Chemistry for Physicians and Biologists to cart. $21.42, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of Physical Chemistry for Physicians and Biologists to cart. $31.73, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of Physical Chemistry for Physicians and Biologists to cart. $52.72, new condition, Sold by Booksplease rated 3.0 out of 5 stars, ships from Southport, MERSEYSIDE, UNITED KINGDOM, published 2022 by Legare Street Press.
