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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C_P~o、S_T~o-S_O~o、H_T~o-H_O~o2和-(G_T~o-G_O~o)/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。
Established a set of vacuum adiabatic calorimeter. The molar heat capacity of KCl was measured at 60-300K. The obtained results are in good agreement with the literatures, which shows that the built calorimeter is reliable. The molar heat capacities of anhydrous uranyl sulfate and uranyl nitrate trihydrate were determined using the calorimeter at 60-300 K and no anomalies of heat capacity were found within the investigated temperature range. The values of C_P ~ o, S_T ~ o ~ S_O ~ o, H_T ~ o ~ H_O ~ o2 and - (G_T ~ o ~ G_O ~ o) / T at 298.15K for uranyl sulfate anhydrous and uranyl nitrate trihydrate, The former were 33.46 calories per mole, 39.7 ± 0.4 calories per mole, 5925 ± 20 calories per mole and 19.7 ± 0.2 calories per mole respectively. The latter were 76.50 calories per mole, 88.3 ± 0.9 calories, respectively / Degree · mol, 13282 ± 50 cal / mol and 43.7 ± 0.4 cal / mol · mol.