Low-tmperature Heat Capacities and Standard Molar Enthalpy of Formationof 4-Nitrobenzyl Alcohol

ISL OpenIR > 青海盐湖研究所知识仓储

	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
发表期刊	CHINESE JOURNAL OF CHEMISTRY
ISSN	1001-604X
卷号	27 期号:7 页码:1225-1231
关键词	4-nitrobenzyl Alcohol Low-temperature Heat Capacity Thermodynamic
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.
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/2100
专题	青海盐湖研究所知识仓储
推荐引用方式 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.