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Low-tmperature Heat Capacities and Standard Molar Enthalpy of Formationof 4-Nitrobenzyl Alcohol
Meng Qingfen; Tan Zhicheng; Wang Xiaohuan; Dong Yaping; Li Wu; Shi Quan
2009
Source PublicationCHINESE JOURNAL OF CHEMISTRY
ISSN1001-604X
Volume27Issue:7Pages:1225-1231
Contribution RankSCI
Keyword4-nitrobenzyl Alcohol Low-temperature Heat Capacity Thermodynamic
LanguageLow-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.
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/2100
Collection青海盐湖研究所知识仓储
Recommended Citation
GB/T 7714
Meng Qingfen,Tan Zhicheng,Wang Xiaohuan,et al. Low-tmperature Heat Capacities and Standard Molar Enthalpy of Formationof 4-Nitrobenzyl Alcohol[J]. CHINESE JOURNAL OF CHEMISTRY,2009,27(7):1225-1231.
APA Meng Qingfen,Tan Zhicheng,Wang Xiaohuan,Dong Yaping,Li Wu,&Shi Quan.(2009).Low-tmperature Heat Capacities and Standard Molar Enthalpy of Formationof 4-Nitrobenzyl Alcohol.CHINESE JOURNAL OF CHEMISTRY,27(7),1225-1231.
MLA Meng Qingfen,et al."Low-tmperature Heat Capacities and Standard Molar Enthalpy of Formationof 4-Nitrobenzyl Alcohol".CHINESE JOURNAL OF CHEMISTRY 27.7(2009):1225-1231.
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