| 摘要 |
1, 066, 492. Measuring heat of reaction electrically. MICROSCAL Ltd. June 2, 1965, [June 4, 1964], No. 23139/64. Addition to 822, 432. Heading G1N. Apparatus for determining the heat of reaction between a fluid and a solid reactant comprises a cell holding the solid reactant and thermistors for measuring the temperature change. As shown (Fig. 5) a granular solid reactant 20 is located in a calorimeter 5, and supported by a wire gauze 7. Suitable heat shielding 9 and insulation 18 is supplied externally. A stream of inert liquid acting as a solvent or carrier for the test fluid is introduced via the funnel 19 shown, and the test liquid via another funnel 19 not shown, or a test gas via inlet 25. The temperature of the solid reactant is measured by thermistors 1, 2 and compared with the ambient temperature measured by thermistors 3, 4, in a D. C. bridge circuit. The ambient temperature may be raised to a steady value by a heating coil 13. The apparatus is calibrated with a further heating coil (not shown) in the solid reactant 20, by measuring the power required to produce the same temperature change. The apparatus may be used for identifying the constituents of a fractionated liquid mixture. |
