高等学校化学学报

高等学校化学学报 ›› 1982, Vol. 3 ›› Issue (3): 374.

• 论文 • 上一篇    下一篇

无水硫酸铀酰和三水合硝酸铀酰的真空绝热量热学研究

冯师颜, 张志英, 张随纯   

  1. 西北大学热化学研究室
  • 收稿日期:1981-01-17 出版日期:1982-08-24 发布日期:1982-08-24

THE VACUUM ADIABATIC CALORIMETRY OF ANHYDROUS URANYL SULPHATE AND URANYL NITRATE TRIHYDRATE

Feng Shiyan, Zhang Zhiying, Zhang Suichun   

  1. Research Laboratory of Thermochemistry, Northwestern University, Xian
  • Received:1981-01-17 Online:1982-08-24 Published:1982-08-24

PDF (PC)

被引次数

8

摘要： 建立了一套真空绝热量热计。在60-300K间测定了氯化钾的摩尔热容,所得结果同文献值相比能较好地符合,说明所建量热计是可靠的。用该量热计在60-300K间测定了无水硫酸铀酰和三水合硝酸铀酰的摩尔热容,在所研究的温度范围内未发现热容反常。无水硫酸铀酰和三水合硝酸铀酰在298.15K下的CPo、STo-SOo、HTo-HOo和-(GTo-GOo)/T值,前者分别为33.46卡/度·摩尔、39.7±0.4卡/度·摩尔、5925±20卡/摩尔和19.7±0.2卡/度·摩尔;后者分別为76.50卡/度·摩尔、88.3±0.9卡/度·摩尔、13282±50卡/摩尔和43.7±0.4卡/度·摩尔。

Abstract: A vacuum adiabatic calorimeter has been established in our laboratory. In order to ascertain the precision and the accuracy of the whole apparatus, the heat capacity of KCl was measured from 60K to 300K. The difference between the weights of the samples used in the two series of experiments is 18.6255g. Except for a few points, the deviation of the experimental points from the smooth curve does not exceed ±0.3 per cent.The selected values of molar heat capacity of KCl are tabulated from 60 K to 300 K, and are compared with the values given by other authors. Our result is in agreement with the literature values with the deviation not exceeding±0.3 per cent, which shows our calorimeter is reliable.The heat capacities of UO2SO4 and UO2(NO3)2. 3H2O have been measured from 60K to 300K by the above-mentioned calorimeter. No thermal anomalies were found. Except for a few points, the deviation of the experimental points from the smooth curves for the two compounds does not exceed ±0.2 per cent.

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