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本文通过半导体多用量热计的研制和实验工作,证明了半导体致冷与量热学相结合的有效性。本量热计采用了我们自己设计制造的半导体恒温槽和温差电传感器。恒温槽使用温度范围为0℃～60℃,传感器监测温差的灵敏度为25μv/0.001℃。本量热计既能以绝热法操作,也能以环境等温法操作。测试精度为0.06%左右。在前一种情况下,用水来标定量热计,所得结果为C_p(25℃)=0.9981±0.0030Cal/g·℃;在后一种情形下,用Kcl来标定,得▽H(200H_2O·298.15k)=17.556±0.011KJ/mol。所得结果与1974年IUPAC的推荐值非常符合。
In this paper, through the development and experiment of semiconductor multi-purpose calorimeter, it is proved that the combination of semiconductor cooling and calorimetry is effective. The calorimeter uses our own design and manufacture of semiconductor thermostat and temperature sensor. Constant temperature bath temperature range of 0 ℃ ~ 60 ℃, the sensitivity of the sensor to monitor the temperature difference of 25μv / 0.001 ℃. The calorimeter can operate both with adiabatic method and with ambient isothermal method. Test accuracy of about 0.06%. In the former case, the calorimeter was calibrated with water and the result was C_p (25 ° C) = 0.9981 ± 0.0030Cal / g ° C; in the latter case, Kcl was used to calibrate to give ▽ H (200H_2O · 298.15k) = 17.556 ± 0.011KJ / mol. The results are in good agreement with the 1974 IUPAC recommendations.