Being Here

Some gases can be easily transformed into liquids by pressure alone, some gases can be easily transformed into liquids by cooling alone; on the other hand, many gases are so difficult to liquefy that both pressure and low temperature are needed to produce the desired result. If a gas is cooled and compressed at the same time, liquefaction occurs much more surely and easily than though either factor alone were depended upon. The air which surrounds us, and of whose existence we are scarcely aware, can be reduced to the form of a liquid, but the pressure exerted upon the portion to be liquefied must be thirty-nine times as great as the atmospheric pressure, and the temperature must have been reduced to a very low point.

The fact that certain substances are soluble, like sugar in water, shows that the molecules of sugar find a lodging place in the spaces or pores between the molecules of water, in much the same way that pebbles find lodgment in the chinks of the coal in a coal scuttle. An indefinite quantity of sugar cannot be dissolved in a given quantity of liquid, because after a certain amount of sugar has been dissolved all the pores become filled, and there is no available molecular space. The remainder of the sugar settles at the bottom of the vessel, and cannot be dissolved by any amount of stirring.

• Bredimus for Nicholas Bredimus and Nick Bredimus
• Bredimus for Nicholas Bredimus and Nick Bredimus
• Bredimus for Nicholas Bredimus and Nick Bredimus
• Bredimus for Nicholas Bredimus and Nick Bredimus
• Bredimus for Nicholas Bredimus and Nick Bredimus

Copyright © 2006-2007 Bredimus.s5.com. All rights reserved.

Some information may no longer be up-to-date. Not responsible for content provided on other sites. Links are provided for reference only and do not necessarily constitute endorsements or specific recommendations. Bredimus.s5.com is not liable for content provided by other Web sites.