| 水合偏硼酸钾的热化学研究(英文) |
| Study on Thermochemistry of Hydrated Potassium Monoborate |
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| 摘要: |
| 关键词: 水合偏硼酸钾 标准摩尔生成焓 溶解量热法 溶解焓 |
| 基金项目: |
| Abstract: Hydrated potassium monoborate(KBO2·4/3H2O) was obtained from an aqueous solution in a mole ratio of K2O∶B2O3=2∶1 and characterized by powder X-ray diffraction(XRD)， infrared spectroscopy(FT-IR) and Raman spectroscopy. The enthalpy of solution of hydrated potassium monoborate， KBO2·4/3H2O， in approximately 1mol·dm-3 aqueous hydrochloric acid was determined. Together with the previously determined enthalpies of so-lution of H3BO3 in approximately 1mol·dm-3 HCl(aq) ，and of KCl in aqueous(hydrochloric acid+boric acid)， the standard molar enthalpy of formation of -(1411.11±0.84)kJ·mol-1 for KBO2·4/3H2O was obtained from the standard molar enthalpies of formation of KCl(s)， H3BO3(s)， and H2O(l). The standard molar entropy of formation of -422.94J·K-1·mol-1 and standard molar entropy of 163.47J·K-1·mol-1 for KBO2·4/3H2O were calculated from the thermodynamic relations. A group contribution method is applicable to KBO2·4/3H2O. |
| Keywords: KBO2·4/3H2O standard molar enthalpy of formation solution calorimetry molar enthalpy of solution |
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| 朱黎霞,高世扬,王波,夏树屏.水合偏硼酸钾的热化学研究(英文)[J].无机化学学报,2003,19(3):333-336. |
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