The analysis of fuel, gas, water, and lubricants . ne, benzene and other very volatilehydrocarbons the difficulty of securing an accurate weight of thematerial taken is met by the following procedure: Draw outan ordinary soft glass tube into a capillary about 1 mm. indiameter. By softening the end it may be blown into a smallthin walled bulb as shown in Fig. 34. After a little practice it isnot difficult to blow such bulbs to weigh less than are used as follows: Weigh the bulb carefully, then by dip- 158 FUEL, GAS, WATER AND LUBRICATION ping the capillary end into the liquid and
The analysis of fuel, gas, water, and lubricants . ne, benzene and other very volatilehydrocarbons the difficulty of securing an accurate weight of thematerial taken is met by the following procedure: Draw outan ordinary soft glass tube into a capillary about 1 mm. indiameter. By softening the end it may be blown into a smallthin walled bulb as shown in Fig. 34. After a little practice it isnot difficult to blow such bulbs to weigh less than are used as follows: Weigh the bulb carefully, then by dip- 158 FUEL, GAS, WATER AND LUBRICATION ping the capillary end into the liquid and alternately warminggently and cooling the bulb a quantity of the liquid may be madeto flow up into it. When about gram is obtained, seal thetip of the capillary in the flame and weigh accurately. Add theaccelerator to the fusion cup in the usual manner reducing anylumps to a fine powder. Add also gram carefully weighedstandard benzoic acid and the bulb containing the liquid fuel,then over all, the measure of sodium peroxide. Press a glass. Fig. 34.—Glass bulbs, used as containers for volatile liquids. rod down through the chemical above the bulb just sufficientto break it. Remove the rod which should be freed from adher-ing particles by cleaning it in the upper part of the sodium per-oxide as yet unmixed with any of the other ingredients. Put inplace as quickly as possible the ignition top with fuse wireattached and clamp firmly in place by means of the screw very thoroughly to insure complete mixing of the lightly on the desk to bring all of the material together andassemble for the regular procedure. In calculating, a correctionis necessary, in addition to those normally observed, on accountof the heat of fusion due to the glass present. This amounts °F. for each gram of glass used in the bulb. This shouldbe subtracted along with the correction for accelerator benzoic CALORIMETRY USING SODIUM PEROXIDE 159 acid and fuse wire. The corre
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectchemist, bookyear1922
