Low-tmperature Heat Capacities and Standard Molar Enthalpy of Formationof 4-Nitrobenzyl Alcohol
文献类型：期刊论文
| 作者 | Li Wu ; Dong Yaping; Meng Qingfen
|
| 刊名 | CHINESE JOURNAL OF CHEMISTRY
 |
| 出版日期 | 2009 |
| 卷号 | 27期号:7页码:1225-1231 |
| 关键词 | 4-nitrobenzyl alcohol low-temperature heat capacity thermodynamic |
| ISSN号 | 1001-604X |
| 语种 | Low-temperature heat capacities of 4-nitrobenzyl alcohol (4-NBA) have been measured by a high precision automated adiabatic calorimeter over the temperature range from 78 to 396 K. The melting temperature, the molar enthalpy and entropy of the phase transition were determined to be (336.426 +/- 0.088) K, (20.97 +/- 0.13) kJ.mol(-1) and (57.24 +/- 0.36) J.K(-1).mol(-1), respectively. The thermodynamic functions [H(T)-H(298.15 K)] and [S(T)-S(298.15 K)] were calculated in the range from 80 to 400 K at the interval of 5 K. The constant-volume energy and standard molar enthalpy of combustion have been determined, Delta(c)U(C(7)H(7)NO(3), s) = - (3549.11 +/- 1.47) kJ.mol(-1) and Delta(c)H(m)(o)(C(7)H(7)NO(3), s) = - (3548.49 +/- 1.47) kJ.mol(-1), by means of a precision oxygen-bomb combustion calorimeter at T=298.15 K. The standard molar enthalpy of formation has been derived, Delta(f)H(m)(o)(C(7)H(7)NO(3), s) = - (206.49 +/- 2.52) kJ.mol(-1), from the standard molar enthalpy of combustion in combination with other auxiliary thermodynamic quantities through a Hess thermochemical cycle. Low-temperature heat capacities of 4-nitrobenzyl alcohol (4-NBA) have been measured by a high precision automated adiabatic calorimeter over the temperature range from 78 to 396 K. The melting temperature, the molar enthalpy and entropy of the phase transition were determined to be (336.426 +/- 0.088) K, (20.97 +/- 0.13) kJ.mol(-1) and (57.24 +/- 0.36) J.K(-1).mol(-1), respectively. The thermodynamic functions [H(T)-H(298.15 K)] and [S(T)-S(298.15 K)] were calculated in the range from 80 to 400 K at the interval of 5 K. The constant-volume energy and standard molar enthalpy of combustion have been determined, Delta(c)U(C(7)H(7)NO(3), s) = - (3549.11 +/- 1.47) kJ.mol(-1) and Delta(c)H(m)(o)(C(7)H(7)NO(3), s) = - (3548.49 +/- 1.47) kJ.mol(-1), by means of a precision oxygen-bomb combustion calorimeter at T=298.15 K. The standard molar enthalpy of formation has been derived, Delta(f)H(m)(o)(C(7)H(7)NO(3), s) = - (206.49 +/- 2.52) kJ.mol(-1), from the standard molar enthalpy of combustion in combination with other auxiliary thermodynamic quantities through a Hess thermochemical cycle. |
| 公开日期 | 2013-10-07 |
| 源URL | [http://ir.isl.ac.cn/handle/363002/2100]  |
| 专题 | 青海盐湖研究所_青海盐湖研究所知识仓储 |
| 推荐引用方式 GB/T 7714 | Li Wu,Dong Yaping,Meng Qingfen. Low-tmperature Heat Capacities and Standard Molar Enthalpy of Formationof 4-Nitrobenzyl Alcohol[J]. CHINESE JOURNAL OF CHEMISTRY,2009,27(7):1225-1231. |
| APA | Li Wu,Dong Yaping,&Meng Qingfen.(2009).Low-tmperature Heat Capacities and Standard Molar Enthalpy of Formationof 4-Nitrobenzyl Alcohol.CHINESE JOURNAL OF CHEMISTRY,27(7),1225-1231. |
| MLA | Li Wu,et al."Low-tmperature Heat Capacities and Standard Molar Enthalpy of Formationof 4-Nitrobenzyl Alcohol".CHINESE JOURNAL OF CHEMISTRY 27.7(2009):1225-1231. |
入库方式： OAI收割
来源：青海盐湖研究所
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