Enthalpy of Formation, Heat Capacity and Entropy of Melamine

	Enthalpy of Formation, Heat Capacity and Entropy of Melamine
	Liu Peng 1; Xiong Wei 1; Hu Shan-Zhou 1; Li Xi 1; Tan Zhi-Cheng 2
刊名	acta physico-chimica sinica
	2009-12-01
卷号	25 期号:12 页码:2417-2421
关键词	Heat capacity Melamine Combustion heat Adiabatic calorimeter
英文摘要	the thermodynamic properties of melamine were studied by multiple thermochernical methods. a bomb combustion calorimeter was used to determine the combustion heat of melamine at 298.15 k. according to the results, we calculated the standard molar enthalpy of combustion and standard molar enthalpy of formation of melamine: delta h-c(m)theta=(-2455.17 +/- 4.65) kj mol(-1); delta h-f(m)theta=(-763.38 +/- 5.16) kj.mol(-1). the bond enthalpy of c approximate to n (between single bond and double bond) in melamine was then estimated to be 458.30 kj.mol(-1) according to the ralationship between bond enthalpy and combustion enthalpy. this value is larger than that of c-n but smaller than that of c=n. heat capacity measurements were carried out in a small sample adiabatic calorimeter from 80 to 385 k. we obtained delta h-f(m)theta at different temperatures between 80 and 385 k using the heat capacity data. through calculation with the values of heat capacity, the relationship between the standard molar enthalpy of formation and temperature is also presented as a functional equation. we also measured the thermol stability of melamine by the thermogravimetry-differential scanning calorimetry (tg-dsc) technique, which showed a thermal decomposition peak at 603.37 k for the dsc curve.
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, physical
研究领域[WOS]	chemistry
关键词[WOS]	acid ; toxicity ; nitrogen ; samples ; resin ; cats
收录类别	SCI
语种	英语
WOS记录号	WOS:000272817500003
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/141285]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Wuhan Univ Technol, Sch Sci, Dept Chem, Wuhan 430070, Hubei, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab & China Ion Liquid Laoratory, Dalian 116023, Liaoning Prov, Peoples R China
推荐引用方式 GB/T 7714	Liu Peng,Xiong Wei,Hu Shan-Zhou,et al. Enthalpy of Formation, Heat Capacity and Entropy of Melamine[J]. acta physico-chimica sinica,2009,25(12):2417-2421.
APA	Liu Peng,Xiong Wei,Hu Shan-Zhou,Li Xi,&Tan Zhi-Cheng.(2009).Enthalpy of Formation, Heat Capacity and Entropy of Melamine.acta physico-chimica sinica,25(12),2417-2421.
MLA	Liu Peng,et al."Enthalpy of Formation, Heat Capacity and Entropy of Melamine".acta physico-chimica sinica 25.12(2009):2417-2421.