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化学学报
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化学学报 ›› 1988, Vol. 46 ›› Issue (10): 967-971. 上一篇    下一篇

研究论文

库水硼镁石2MgO.3B2O3.15H2O的65-310K间的比热测定及其热力学性质的计算

黄树丰;张强;李亚荣;陈佩珩   

  1. 西北大学化学系
  • 发布日期:1988-10-15

The specific heat measurements of kurnakovite (2MgO.3B2O3.15H2O) from 65 to 310K and calculation of its thermodynamic properties

HUANG SHUFENG;ZHANG QIANG;LI YARONG;CHEN PEIHENG   

  • Published:1988-10-15

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用真空绝热量热计测定了库水硼镁石2MgO.3B2O3.15H2O在65-310K间的比热.根据Debye-Einsein函数组合式, 计算了0-65K间的比热, 其误差为0.4%.在65-310K范围内, 每隔5K, 计算了熵、焓和自由能函数.

关键词: 热力学性质, 硼镁石, 氧化镁, 水合物, 熵, 焓, 比热, 氧化硼

The sp. heat of kurnakovite (2MgO.3B2O3.15H2O) was measured at 65-310 K by using the adiabatic calorimeter. The math. relation between the sp. heats and temps. is given. The sp. heat of kurnakovite at 0-65 K was calculated by Debye-Einstein function. The entropy (S), enthalpy (H), and Gibb's free energy (G) were calculated and are tabulated for intervals of 5 K at 65-310 K. At 299.15 K, S = 723.4 ?4.8 J/K.mol, H = 118.8 ?0.2 kJ/K.mol, G = 327 ?5.4 J/K.mol.

Key words: THERMODYNAMIC PROPERTIES, CAMSELLITE, MAGNESIUM OXIDE, HYDRATE, ENTROPY, ENTHALPY, SPECIFIC HEAT, BORON OXIDE

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