Home

Citation: Lu Qin-Ying, Song Yong-Ji, Meng Shuang-He, Xing Jun, Tan Zhi-Cheng. Low Temperature Heat Capacities and Thermal Analysis of N-(p-methylphenyl)-N′-(2-pyridyl)urea[J]. Acta Physico-Chimica Sinica, ;2002, 18(02): 166-169. doi: 10.3866/PKU.WHXB20020215 shu

Low Temperature Heat Capacities and Thermal Analysis of N-(p-methylphenyl)-N′-(2-pyridyl)urea

1.
Thermochemistry Laboratory, Dalian Institute of Chemical Physics,Chinese Academy of Sciences, Dalian　116023;Department of Chemical Engineering,Beijing Institute of Petrochemical Technology, Beijing　102600;Dalian Technology Center,the Lubrication Company of China National Petroleum Corporation, Dalian　116031

Received Date: 15 August 2001
Available Online: 15 February 2002

Heat capacities of N-(p-methylphenyl)-N′-(2-pyridyl)urea were determined by low temperature adiabatic calorimetry in the temperature range of 80 to 370 K. It is found that there is no heat anomaly in this temperature region. With the experimental heat capacities thermodynamic functions were calculated. To investigate the thermal stability and decomposition characteristics of N-(p-methylphenyl)-N′-(2-pyridyl)urea, DSC and TG experiments were carried out. The results indicated that N-(p-methylphenyl)-N′-(2-pyridyl)urea started to melt at 153 ℃ and the melting peak located at 173.86 ℃. The melting enthalpy is 204.45 kJ•mol－1. The decomposition peak of N-(p-methylphenyl)-N′-(2-pyridyl)urea was found at 226.11 ℃ from DSC curve. This result is similar with that from TG and DTG experiment, in which the weight loss peak was determined as 227.2 ℃.
- N-(p-methylphenyl)-N′-(2-pyridyl)urea;Adiabatic calorimetry;Thermodynamic function;Thermal analysis
1. [1]
  Zehua Zhao , Xiaoyan An , Jinrong Xu , Ling Yang , Hao Zhao , Zhongyun Wu . Independent Development and Application of Calorimetric Experiment Data Acquisition and Processing Software. University Chemistry, 2025, 40(11): 402-408. doi: 10.12461/PKU.DXHX202505045
2. [2]
  Zhuo WANG , Junshan ZHANG , Shaoyan YANG , Lingyan ZHOU , Yedi LI , Yuanpei LAN . Preparation and photocatalytic performance of CeO₂-reduced graphene oxide by thermal decomposition. Chinese Journal of Inorganic Chemistry, 2024, 40(9): 1708-1718. doi: 10.11862/CJIC.20240067
3. [3]
  Chunguang Rong , Miaojun Xu , Xingde Xiang , Song Liu . 化学热力学熵变计算的教学探讨. University Chemistry, 2025, 40(8): 323-329. doi: 10.12461/PKU.DXHX202409146
4. [4]
  Qingtao Niu , Xinyao Xu , Weiyue Yu , Shuxiang Meng , Zhiguo Lv , Manman Jin . Exploration and Practice of Science-Education Integration in Chemical Engineering Thermodynamics Teaching for Chemical Engineering Majors: A Case of Chemical Engineering Physical Property Data Estimation and Chemical Reaction Equilibrium. University Chemistry, 2025, 40(10): 1-9. doi: 10.12461/PKU.DXHX202412029
5. [5]
  Yahui HAN , Jinjin ZHAO , Ning REN , Jianjun ZHANG . Synthesis, crystal structure, thermal decomposition mechanism, and fluorescence properties of benzoic acid and 4-hydroxy-2, 2′: 6′, 2″-terpyridine lanthanide complexes. Chinese Journal of Inorganic Chemistry, 2025, 41(5): 969-982. doi: 10.11862/CJIC.20240395
6. [6]
  Liyang ZHANG , Dongdong YANG , Ning LI , Yuanyu YANG , Qi MA . Crystal structures, luminescent properties and Hirshfeld surface analyses of three cadmium(Ⅱ) complexes based on 2-(3-(pyridin-2-yl)-1H-pyrazol-1-yl)benzoate. Chinese Journal of Inorganic Chemistry, 2024, 40(10): 1943-1952. doi: 10.11862/CJIC.20240079
7. [7]
  Jianchun Wang , Ruyu Xie . The Fantastical Dance of Miss Electron: Contra-Thermodynamic Electrocatalytic Reactions. University Chemistry, 2025, 40(4): 331-339. doi: 10.12461/PKU.DXHX202406082
8. [8]
  Tongqi Ye , Yanqing Wang , Qi Wang , Huaiping Cong , Xianghua Kong , Yuewen Ye . Reform of Classical Thermodynamics Curriculum from the Perspective of Computational Chemistry. University Chemistry, 2025, 40(7): 387-392. doi: 10.12461/PKU.DXHX202409128
9. [9]
  Fengmei Wang , Xin Zhang , Hong Yan , Xiangyu Xu , Guirong Wang . Inverted 'Π' Graphic Memory Method for Thermodynamic Basic Equations and the Application in Teaching Practice. University Chemistry, 2025, 40(11): 369-375. doi: 10.12461/PKU.DXHX202412087
10. [10]
  Yongqing Xu , Yuyao Yang , Mengna Wu , Xiaoxiao Yang , Xuan Bie , Shiyu Zhang , Qinghai Li , Yanguo Zhang , Chenwei Zhang , Robert E. Przekop , Bogna Sztorch , Dariusz Brzakalski , Hui Zhou . Review on Using Molybdenum Carbides for the Thermal Catalysis of CO₂ Hydrogenation to Produce High-Value-Added Chemicals and Fuels. Acta Physico-Chimica Sinica, 2024, 40(4): 2304003-0. doi: 10.3866/PKU.WHXB202304003
11. [11]
  Xiaohui Li , Ze Zhang , Jingyi Cui , Juanjuan Yin . Advanced Exploration and Practice of Teaching in the Experimental Course of Chemical Engineering Thermodynamics under the “High Order, Innovative, and Challenging” Framework. University Chemistry, 2024, 39(7): 368-376. doi: 10.3866/PKU.DXHX202311027
12. [12]
  Yang Lv , Yingping Jia , Yanhua Li , Hexiang Zhong , Xinping Wang . Integrating the Ideological Elements with the “Chemical Reaction Heat” Teaching. University Chemistry, 2024, 39(11): 44-51. doi: 10.12461/PKU.DXHX202402059
13. [13]
  Yang ZHOU , Lili YAN , Wenjuan ZHANG , Pinhua RAO . Thermal regeneration of biogas residue biochar and the ammonia nitrogen adsorption properties. Chinese Journal of Inorganic Chemistry, 2025, 41(8): 1574-1588. doi: 10.11862/CJIC.20250032
14. [14]
  Ruming Yuan , Pingping Wu , Laiying Zhang , Xiaoming Xu , Gang Fu . Patriotic Devotion, Upholding Integrity and Innovation, Wholeheartedly Nurturing the New: The Ideological and Political Design of the Experiment on Determining the Thermodynamic Functions of Chemical Reactions by Electromotive Force Method. University Chemistry, 2024, 39(4): 125-132. doi: 10.3866/PKU.DXHX202311057
15. [15]
  Limei CHEN , Mengfei ZHAO , Lin CHEN , Ding LI , Wei LI , Weiye HAN , Hongbin WANG . Preparation and performance of paraffin/alkali modified diatomite/expanded graphite composite phase change thermal storage material. Chinese Journal of Inorganic Chemistry, 2024, 40(3): 533-543. doi: 10.11862/CJIC.20230312
16. [16]
  Yuting Bai , Cenqi Yan , Zhen Li , Jiaqiang Qin , Pei Cheng . Preparation of High-Strength Polyimide Porous Films with Thermally Closed Pore Property by In Situ Pore Formation Method. Acta Physico-Chimica Sinica, 2024, 40(9): 2306010-0. doi: 10.3866/PKU.WHXB202306010
17. [17]
  Yiying Yang , Dongju Zhang . Elucidating the Concepts of Thermodynamic Control and Kinetic Control in Chemical Reactions through Theoretical Chemistry Calculations: A Computational Chemistry Experiment on the Diels-Alder Reaction. University Chemistry, 2024, 39(3): 327-335. doi: 10.3866/PKU.DXHX202309074
18. [18]
  Yue Wu , Jun Li , Bo Zhang , Yan Yang , Haibo Li , Xian-Xi Zhang . Research on Kinetic and Thermodynamic Transformations of Organic-Inorganic Hybrid Materials for Fluorescent Anti-Counterfeiting Application information: Introducing a Comprehensive Chemistry Experiment. University Chemistry, 2024, 39(6): 390-399. doi: 10.3866/PKU.DXHX202403028
19. [19]
  Zihan Cheng , Kai Jiang , Jun Jiang , Henggang Wang , Hengwei Lin . Achieving thermal-stimulus-responsive dynamic afterglow from carbon dots by singlet-triplet energy gap engineering through covalent fixation. Acta Physico-Chimica Sinica, 2026, 42(2): 100169-0. doi: 10.1016/j.actphy.2025.100169
20. [20]
  Yuchen Zhou , Huanmin Liu , Hongxing Li , Xinyu Song , Yonghua Tang , Peng Zhou . Designing thermodynamically stable noble metal single-atom photocatalysts for highly efficient non-oxidative conversion of ethanol into high-purity hydrogen and value-added acetaldehyde. Acta Physico-Chimica Sinica, 2025, 41(6): 100067-0. doi: 10.1016/j.actphy.2025.100067

Get Citation

PDF

XML

Metrics

PDF Downloads(2451)
Abstract views(3670)
HTML views(71)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Address：Zhongguancun North First Street 2,100190 Beijing, PR China Tel: +86-010-82449177-888

DownLoad: Full-Size Img PowerPoint

Return