The Physical Properties of Gases |
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absorbed air-pump amount atmospheric pressure atomic weight average Avogadro's law balloon barometer bell jar bodies Boyle's law bulb CARBON BAND carbonic acid gas closed column of mercury compressed condensed constant contain cooled Crookes crown 8vo cubic foot cubic inch cules cylinder density diffusion diminishes discharge electrode energy of motion equal escape ether evidence exactly exhaustion expand experiments Fahrenheit filled fluid force give glass tube greater heat hydrogen inch of mercury increase isotherm kinetic theory lampblacked less light liquid mass of gas mean free path measured mercury column metal mole nitrogen number of molecules observed ordinary oxygen particles perature piston plate pounds pres properties of gases proportional pump radiation raised rebounding rise in temperature saturated scale seen shown side solid spectrum square inch stopcock striking substance surface temperature and pressure tion vacuum valve vanes velocity vessel vibrations viscosity volume water vapor zero
Popular passages
Page 177 - ... seen on considering some specific case. Ordinary ethyl alcohol and methyl ether differ greatly from each other — the first is a liquid whilst the second is a gas at ordinary temperatures — but possess the same molecular composition, the molecule in each case consisting of two atoms of carbon, six of hydrogen and one of oxygen.
Page 190 - Avogadro's hypothesis that equal volumes of all gases under the same conditions of temperature and pressure contain the same number of molecules...
Page 231 - Avogadro's law states that equal volumes of all gases at the same temperature and pressure contain the same number of molecules...
Page 81 - But if it is sufficiently compressed or cooled, it reaches a point where it begins to condense. It then no longer obeys the same laws as a gas...
Page 67 - Regnault, show that the above results, though close approximations to the truth, are not rigorously exact. Regnault found that there are differences in the rates of expansion of the different gases, which are, however, exceedingly small in the more perfect gases, such as air, hydrogen, nitrogen, oxygen, and carbon monoxide ; and also very careful experiments showed that, when the gases were kept at constant pressure and allowed to expand, slightly different results were obtained from those found...
Page 21 - Thus molecular science sets us face to face with physiological theories. It forbids the physiologist from imagining that structural details of infinitely small dimensions can furnish an explanation of the infinite variety which exists in the properties and functions of the most minute organisms.
Page 35 - A scale is marked upon this sheath, so that the height of the column above the surface of the mercury in the reservoir may be easily read.
Page 20 - ... about 50 of the more elementary atoms, we may assume that the smallest organised particle visible under the microscope contains about two million molecules of organic matter. At least half of every living organism consists of water, so that the smallest living being visible under the microscope does not contain more than about a million organic molecules. Some exceedingly simple organism may be supposed built up of not more than a million similar molecules. It is impossible, however, to conceive...
Page 141 - ... as fast as the latter gas. Absorption of Gases by Liquids.— Many gases are readily absorbed by water. Other liquids also possess this power in a greater or less degree. Water will for example, absorb its own volume of carbonic-acid gas...