2
0
2009
sin
agr
0
journal
Original
Singh, N. B.[Nakshatra B.]
Agrawal, T.[Tanvi]
Gupta, P.[Preeti]
Das, S. S.[Shiva Saran]
J. Chem. Eng. Data
2009
2020-09-29
Solidification Behavior of the Benzamide + O-Chlorobenzoic Acid Eutectic System
The phase diagram of the benzamide + o-chlorobenzoic acid system has been studied by the thaw-melt method, and results show the formation of a simple eutectic mixture. Values of enthalpies of fusion of pure components and the eutectic mixture were determined from DSC studies. Excess Gibb s energy (GE), excess enthalpy (HE), and excess entropy (SE) of mixing of pre-, post-, and the eutectic mixture were also calculated using activity coefficient data. Linear velocities of solidification of pure components and the eutectic mixture were determined at different undercooling rates. The values of the excess thermodynamic functions, linear velocity of crystallization, and ab initio calculations indicate the nonideal nature of the eutectic mixture in the melt. The anisotropic and instantaneous crystallizations of benzamide, o-chlorobenzoic acid, and the eutectic mixture were studied. The flexural strengths of the pure components and the eutectic mixture were also measured.
10.1021/je800848u
5
54
1529-1536
1
InChI=1S/C7H7NO/c8-7(9)6-4-2-1-3-5-6/h1-5H,(H2,8,9)
KXDAEFPNCMNJSK-UHFFFAOYSA-N
benzamide
benzoic acid amide
C7H7NO
1
Commercial source
1
Crystallization from solution
2
99
2
Estimated by the compiler
2
InChI=1S/C7H5ClO2/c8-6-4-2-1-3-5(6)7(9)10/h1-4H,(H,9,10)
IKCLCGXPQILATA-UHFFFAOYSA-N
2-chlorobenzoic acid
o-chlorobenzoic acid
C7H5ClO2
1
Commercial source
1
Crystallization from solution
2
99
2
Estimated by the compiler
1
1
1
Principal objective of the work
PW
TRC
7/21/2009
1
Molar enthalpy of transition or fusion, kJ/mol
DSC
Crystal
Direct value, X
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Crystal
Liquid
Air at 1 atmosphere
1
23.1419398848
7
1
0.6807878044
2
1
1
Principal objective of the work
RDC
TRC
7/21/2009
1
Normal melting temperature, K
VISOBS
Crystal
Direct value, X
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Crystal
Liquid
Air at 1 atmosphere
1
400.15
5
1
0.4
3
2
1
Principal objective of the work
PW
TRC
7/21/2009
1
Molar enthalpy of transition or fusion, kJ/mol
DSC
Crystal
Direct value, X
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Crystal
Liquid
Gas
1
27.533714346
7
1
0.790658805
4
2
1
Principal objective of the work
RDC
TRC
7/21/2009
1
Normal melting temperature, K
VISOBS
Crystal
Direct value, X
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Crystal
Liquid
Air at 1 atmosphere
1
414.15
5
1
0.4
5
1
1
2
1
Principal objective of the work
PW
TRC
7/21/2009
1
Eutectic temperature, K
DTA::::
Crystal
Direct value, X
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Crystal
1
Crystal
2
Liquid
Air at 1 atmosphere
1
345.05
5
1
2
6
1
1
2
1
Principal objective of the work
PW
TRC
7/21/2009
1
Solid-liquid equilibrium temperature, K
VISOBS:UFactor:16
Liquid
Direct value, X
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
Crystal
1
1
Pressure, kPa
Liquid
101
3
1
Mole fraction
2
Liquid
1
0
2
1
400.15
4
1
2.5
1
0.075
3
1
396.95
4
1
2.5
1
0.1665
4
1
391.55
4
1
2.5
1
0.2468
4
1
387.85
4
1
2.5
1
0.3467
4
1
381.15
4
1
2.5
1
0.4324
4
1
354.35
4
1
2.5
1
0.4559
4
1
345.95
4
1
2.5
7
1
1
2
1
Principal objective of the work
RDC
TRC
7/21/2009
1
Solid-liquid equilibrium temperature, K
VISOBS:UFactor:16
Liquid
Direct value, X
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
Crystal
2
1
Pressure, kPa
Liquid
101
3
1
Mole fraction
2
Liquid
1
0.5
4
1
377.65
4
1
2.5
1
0.6338
4
1
395.25
4
1
2.5
1
0.7647
4
1
405.75
4
1
2.5
1
0.8636
4
1
407.95
4
1
2.5
1
0.9516
4
1
412.85
4
1
2.5
1
1
5
1
414.15
4
1
2.5