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. 1898 Excerpt: ...point of the most volatile constituent of the mixture: in this tube the liquids having higher boiling points are condensed, and flow back into the still, while the vapor of the more volatile liquid passes on and is condensed separately. A simple laboratory contrivance is a rather wide tube on which a couple of bulbs ...
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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. 1898 Excerpt: ...point of the most volatile constituent of the mixture: in this tube the liquids having higher boiling points are condensed, and flow back into the still, while the vapor of the more volatile liquid passes on and is condensed separately. A simple laboratory contrivance is a rather wide tube on which a couple of bulbs are blown; this is placed vertically in the flask in which we boil the mixed liquid (Fig. 88). The lower part of the tube becomes heated to the temperature of the mixed vapor, which is between the boiling points of the liquids: as some of the most easily condensed vapor is cooled and converted into a liquid, the temperature of the tube gradually falls towards the upper portion, and by carefully regulating the boiling, only the most volatile liquid passes from the apparatus. This is indicated by a thermometer of which the bulb is opposite the side-tube. 295. Benzene, C6H6.--The most volatile constituent of coal-tar is a liquid called benzene. It freezes at 5.5, and boils at 80.5. It does not dissolve in water, but is soluble in alcohol and ether. It is very inflammable, and burns with a bright but smoky flame. The composition of its molecule is C6H6, and yet in most of its reactions it acts like a saturated hydrocarbon. We put a few crystals of iodine into some benzene in a glass flask, and pass chlorine through the liquid; hydrochloric acid gas is given off, and the hydrogen atoms of the benzene are replaced by chlorine. CeH- + CI2 = C6H5C1 + HCl The iodine only helps to break up the molecules of chlorine. Evidently the molecular structure of benzene must be different from that of the other hydrocarbons which we have studied, and we can only account for its resemblance to the saturated hydrocarbons by supposing that its carbon atoms are dif...
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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Fine. Trade paperback (US). Glued binding. 380 p. In Stock. 100% Money Back Guarantee. Brand New, Perfect Condition, allow 4-14 business days for standard shipping. To Alaska, Hawaii, U.S. protectorate, P.O. box, and APO/FPO addresses allow 4-28 business days for Standard shipping. No expedited shipping. All orders placed with expedited shipping will be cancelled. Over 3, 000, 000 happy customers.
