caa a22 4500 463190831 CHVBK 20180406164908.0 cr unu---uuuuu 170326e20070701xx s 000 0 eng 10.1007/s10973-006-7511-8 doi (NATIONALLICENCE)springer-10.1007/s10973-006-7511-8 Thermodynamic investigation of room temperature ionic liquid [Elektronische Daten] Heat capacity and thermodynamic functions of BPBF4 [Z. Zhang, L. Sun, Z. Tan, F. Xu, X. Lv, J. Zeng, Y. Sawada] The molar heat capacities of the room temperature ionic liquid 1-butylpyridinium tetrafluoroborate (BPBF4) were measured by an adiabatic calorimeter in temperature range from 80 to 390 K. The dependence of the molar heat capacity on temperature is given as a function of the reduced temperature X by polynomial equations, C p,m [J K−1 mol−1]=181.43+51.297X −4.7816X 2−1.9734X 3+8.1048X 4+11.108X 5 [X=(T−135)/55] for the solid phase (80-190 K), C p,m [J K−1 mol−1]= 349.96+25.106X+9.1320X 2+19.368X 3+2.23X 4−8.8201X 5 [X=(T−225)/27] for the glass state (198-252 K), and C p,m[J K−1 mol−1]= 402.40+21.982X−3.0304X 2+3.6514X 3+3.4585X 4 [X=(T−338)/52] for the liquid phase (286-390 K), respectively. According to the polynomial equations and thermodynamic relationship, the values of thermodynamic function of the BPBF4 relative to 298.15 K were calculated in temperature range from 80 to 390 K with an interval of 5 K. The glass transition of BPBF4 was observed at 194.09 K, the enthalpy and entropy of the glass transition were determined to be ΔH g=2.157 kJ mol−1 and ΔS g=11.12 J K−1 mol−1, respectively. The result showed that the melting point of the BPBF4 is 279.79 K, the enthalpy and entropy of phase transition were calculated to be ΔH m = 8.453 kJ mol−1 and ΔS m=30.21 J K−1 mol−1. Using oxygen-bomb combustion calorimeter, the molar enthalpy of combustion of BPBF4 was determined to be Δc H m 0 = −5451±3 kJ mol−1. The standard molar enthalpy of formation of BPBF4 was evaluated to be Δf H m 0 = −1356.3±0.8 kJ mol−1 at T=298.150±0.001 K. Springer Science+Business Media LLC, 2007 BPBF4 nationallicence combustion calorimetry nationallicence glass transition nationallicence heat capacity nationallicence room temperature ionic liquid nationallicence phase transition nationallicence standard enthalpy of formation nationallicence Zhang Z. Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, Dalian, P.R. China aut Sun L. Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, Dalian, P.R. China aut Tan Z. Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, Dalian, P.R. China aut Xu F. Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, Dalian, P.R. China aut Lv X. Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, Dalian, P.R. China aut Zeng J. Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, Dalian, P.R. China aut Sawada Y. Department of Nanochemistry, Faculty of Engineering, Tokyo Polytechnic University, 1583 Iiyama, Atsugi, 243-0297, Kanagawa, Japan aut Journal of Thermal Analysis and Calorimetry Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 89/1(2007-07-01), 289-294 1388-6150 89:1<289 2007 89 10973 https://doi.org/10.1007/s10973-006-7511-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-006-7511-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang Z. Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, Dalian, P.R. China aut NATIONALLICENCE 700 1- Sun L. Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, Dalian, P.R. China aut NATIONALLICENCE 700 1- Tan Z. Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, Dalian, P.R. China aut NATIONALLICENCE 700 1- Xu F. Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, Dalian, P.R. China aut NATIONALLICENCE 700 1- Lv X. Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, Dalian, P.R. China aut NATIONALLICENCE 700 1- Zeng J. Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, Dalian, P.R. China aut NATIONALLICENCE 700 1- Sawada Y. Department of Nanochemistry, Faculty of Engineering, Tokyo Polytechnic University, 1583 Iiyama, Atsugi, 243-0297, Kanagawa, Japan aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 89/1(2007-07-01), 289-294 1388-6150 89:1<289 2007 89 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer