A text-book on chemistryFor the use of schools and colleges . , liquid substancesboil at a particular point, which varies with their nature. Table of Boiling Points. Sulphuro us Acid .. 17° Ether 95° Bisulphide of 118° Bromine 145° Alcohol 173° Water 212° Acetic Acid (. 243° Nitric-Acid 248° Oil of Turpentine 314° Phosphorus 554° Sulphuric Acid. 640° Mercury 662° A technical distinction is made between a gas and avapor. By the latter we understand a gas which will Fig. 28. readily take on the liquid form. Some of the leading peculiarities inthe constitution of vapors may be ex-hibite
A text-book on chemistryFor the use of schools and colleges . , liquid substancesboil at a particular point, which varies with their nature. Table of Boiling Points. Sulphuro us Acid .. 17° Ether 95° Bisulphide of 118° Bromine 145° Alcohol 173° Water 212° Acetic Acid (. 243° Nitric-Acid 248° Oil of Turpentine 314° Phosphorus 554° Sulphuric Acid. 640° Mercury 662° A technical distinction is made between a gas and avapor. By the latter we understand a gas which will Fig. 28. readily take on the liquid form. Some of the leading peculiarities inthe constitution of vapors may be ex-hibited by the following experiment:take a glass tube, a a, Fig* 28, with abulb, 6, blown on its upper extremity;pour water into the bulb, filling the tubeto within an inch or two of the end ; this What does Fig. 27 illustrate? Do all fluids boil at the samepoint ? Give the boiling points of sulphurous acid, ether, etc. Whatis the distinction between a gas and a vapor? What fact is Fig. 28intended to illustrate? Describe the instrument and its 46 LATENT HEAT OF VAPORS. Fig. 29. vacant space fill with sulphuric ether; and now, closingthe end of the tube with the finger, invert it in a glassof water, as is represented in the figure. The ether, be-ing much lighter than water, at once rises to the upperpart of the bulb, as is shown by the light space, thebulb being, of course, full of ether and water the application of a spirit-lamp the ether vapor-izes, and presses the water out of the bulb into the glasscup. Three important facts may now be 1st. Vapors occupy more space than the liquids fromwhich they arise. 2d. They have not a misty or fog-like appearance, butare perfectly transparent. 3d. When their temperature is reduced, they collapseto the liquid state. It has already been shown that a large amount ofheat becomes latent, constituting the heat of elasticityof vapors. The temperature of steam is 212°, as is thatof the water from whic
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