汽体流动量热计——苯汽化热与苯汽体热容的测量

Vapor-Flow Calorimeter——The Determination of Heats of Vaporization and Vapor Heat Capacities of Benzene

本文介绍了根据Pitzer型汽体流动量热计和Newsham型汽化热量热计建立的一套同时测定汽化热和汽态热容的汽体流动量热计.该量热计可用于测定有机化合物及其混合物在不同温度下的汽化热、从沸点到200℃范围内的汽体热容.量热计用苯标定,汽化热的精度达到0.5%以上,汽体热容的精度约1%.

A combined vapor-flow calorimeter,modified after the Pitzer’s vapor-flow calorimeterand the Newsham’s vaporization flow calorimeter is described.The calorimeter wasemployed to determine heats of vaporization under different pressures and vapor heatcapacities from boiling temperatures up to 200℃for organic compounds and theirmixtures.The calorimeter was calibrated with benzene,with an accuracy of 0.5%orless for the heat of vaporization and that of about 1%for the vapor heat capacities.