The analysis of fuel, gas, water, and lubricants . Total rise °C. or °F. From the above it is seen that the total rise in temperature ascorrected for radiation, after having the normal correctionsapplied for fuse, accelerator and hydration, should have aremainder, representing the true heat of combustion, of ° °F., since this value multiplied by the constant 3,100 gives6,320 Cal. or 11,376 , the accepted value for benzoic acid. If after several check combustions, the values indicated by theinstrument show a consistent variation, the average dififerencein heat rise
The analysis of fuel, gas, water, and lubricants . Total rise °C. or °F. From the above it is seen that the total rise in temperature ascorrected for radiation, after having the normal correctionsapplied for fuse, accelerator and hydration, should have aremainder, representing the true heat of combustion, of ° °F., since this value multiplied by the constant 3,100 gives6,320 Cal. or 11,376 , the accepted value for benzoic acid. If after several check combustions, the values indicated by theinstrument show a consistent variation, the average dififerencein heat rise should be added if + and subtracted if — from thetrue heat of combustion and the remainder used as a divisor fortlie accepted value thus: with an excess indication of °F. have: ^^^^ - 3 ~ ^*^- That is, the constant for the instrument is 3,083 instead of CHAPTER XXI Calorimetry Using the Oxygen Boivre General Statement.—In the Mahler or Berthelot type ofinstrument, the fuel for combustion is held in a tray supported. I ^4 I i Fig. 35.—C^o^3S section of Parr bomb. within a chamber capable of receiving oxygen under a pressureof 25 to 30 atmospheres. Figure 35 represents such a bomb, theessential parts of which are the cover, C, held in place by the11 161 162 FUEL, GAS, WATER AND LUBRICATION screw clamp, A, the supporting wires, D, for the fuel tray, //,which also are the terminals for conducting the electric currentthrough the fine fuse wire. The assembling of the bomb in the rv^
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectchemist, bookyear1922
