2
0
2009
rom
gon
0
journal
Original
Romero, C. M.[Carmen M.]
Gonzalez, M. E.[Maria E.]
Lamprecht, I.[Ingolf]
Thermochim. Acta
2009
2020-09-29
Enthalpy of dilution of aliphatic amides in aqueous solutions at temperatures between 293.15K and 308.15K
The enthalpies of dilution of aqueous solutions of acetamide, propionamide and butyramide were determined as a function of the molar fraction at 293.15 K, 298.15 K, 303.15K and 308.15K by flow microcalorimetric measurements. The enthalpies of dilution of amides are compared with literature data when available and the results are discussed in terms of solute solvent interactions. The enthalpic interaction coefficients were obtained according to the McMillan Mayer theory. The addition of a CH2 group causes an important change in the interaction coefficients. The pairwise coefficients increase as the number of CH2 groups increase. Two additivity approaches are used in this work: the Savage Wood principle and a simple methylene additivity approach. The results obtained by both methods are presented and compared with literature data.
Amides
Enthalpy of dilution
Pairwise coefficients
Flow calorimetry
10.1016/j.tca.2009.01.021
1-2
488
49-53
1
InChI=1S/C2H5NO/c1-2(3)4/h1H3,(H2,3,4)
DLFVBJFMPXGRIB-UHFFFAOYSA-N
ethanamide
acetamide
acetic acid amide
acetimidic acid
methanecarboxamide
C2H5NO
1
Commercial source
1
99
2
Stated by supplier
2
Dried in a desiccator
2
InChI=1S/C3H7NO/c1-2-3(4)5/h2H2,1H3,(H2,4,5)
QLNJFJADRCOGBJ-UHFFFAOYSA-N
propanamide
propionamide
propionic acid amide
C3H7NO
1
Commercial source
1
97
2
Stated by supplier
2
Dried in a desiccator
3
InChI=1S/C4H9NO/c1-2-3-4(5)6/h2-3H2,1H3,(H2,5,6)
DNSISZSEWVHGLH-UHFFFAOYSA-N
butanamide
butanoic acid amide
butyramide
C4H9NO
1
Commercial source
1
98
2
Stated by supplier
2
Dried in a desiccator
4
InChI=1S/H2O/h1H2
XLYOFNOQVPJJNP-UHFFFAOYSA-N
water
H2O
1
Commercial source
1
Fractional distillation
2
99.5
3
Estimated by the compiler
1
1
1
4
1
Principal objective of the work
VN
TRC
6/17/2009
1
Molar enthalpy of dilution, kJ/mol
Flow calorimetry
Liquid
Direct value, X
4
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Pressure, kPa
Liquid
101.325
6
1
Temperature, K
Liquid
2
Initial molality of solute, mol/kg
Liquid
3
Final molality of solute, mol/kg
Liquid
1
293.15
5
2
0.59992
5
3
0.27356
5
1
0.006
2
1
0.0008
1
293.15
5
2
0.79615
5
3
0.36084
5
1
0.0099
2
1
0.0009
1
293.15
5
2
1.00067
6
3
0.4507
5
1
0.017
3
1
0.001
1
293.15
5
2
1.19891
6
3
0.53672
5
1
0.021
3
1
0.0009
1
293.15
5
2
1.3991
6
3
0.62254
5
1
0.0254
3
1
0.001
1
293.15
5
2
1.59813
6
3
0.70684
5
1
0.0308
3
1
0.0011
1
293.15
5
2
1.79948
6
3
0.7911
5
1
0.0377
3
1
0.0011
1
293.15
5
2
1.99879
6
3
0.87352
5
1
0.0437
3
1
0.0011
1
293.15
5
2
2.50144
6
3
1.07708
6
1
0.0581
3
1
0.0013
1
293.15
5
2
2.99647
6
3
1.27179
6
1
0.0786
3
1
0.0014
1
298.15
5
2
0.59183
5
3
0.28804
5
1
0.0058
2
1
0.0008
1
298.15
5
2
0.79994
5
3
0.39515
5
1
0.0097
2
1
0.0009
1
298.15
5
2
0.9989
5
3
0.48042
5
1
0.013
3
1
0.0009
1
298.15
5
2
1.12499
6
3
0.5391
5
1
0.018
3
1
0.0009
1
298.15
5
2
1.39703
6
3
0.66425
5
1
0.0232
3
1
0.001
1
298.15
5
2
1.59206
6
3
0.75278
5
1
0.0282
3
1
0.001
1
298.15
5
2
1.79159
6
3
0.84234
5
1
0.034
3
1
0.001
1
298.15
5
2
2.01114
6
3
0.96026
5
1
0.0371
3
1
0.0011
1
298.15
5
2
2.50367
6
3
1.17941
6
1
0.0515
3
1
0.0012
1
298.15
5
2
2.99868
6
3
1.36329
6
1
0.0676
3
1
0.0013
1
303.15
5
2
0.60589
5
3
0.30096
5
1
0.0039
2
1
0.0008
1
303.15
5
2
0.79609
5
3
0.3933
5
1
0.0041
2
1
0.0008
1
303.15
5
2
1.00286
6
3
0.49254
5
1
0.0078
2
1
0.0008
1
303.15
5
2
1.21021
6
3
0.5909
5
1
0.0137
3
1
0.0009
1
303.15
5
2
1.40561
6
3
0.68254
5
1
0.0163
3
1
0.0009
1
303.15
5
2
1.60083
6
3
0.7731
5
1
0.0233
3
1
0.001
1
303.15
5
2
1.80351
6
3
0.86609
5
1
0.0275
3
1
0.001
1
303.15
5
2
1.99429
6
3
0.95266
5
1
0.0334
3
1
0.001
1
303.15
5
2
2.49475
6
3
1.17549
6
1
0.0485
3
1
0.0012
1
303.15
5
2
3.0017
6
3
1.39511
6
1
0.0623
3
1
0.0013
1
308.15
5
2
0.59999
5
3
0.27359
5
1
0.001
2
1
0.0008
1
308.15
5
2
0.803
5
3
0.36387
5
1
0.0022
2
1
0.0008
1
308.15
5
2
1.00238
6
3
0.45144
5
1
0.0058
2
1
0.0009
1
308.15
5
2
1.19761
6
3
0.53616
5
1
0.0107
3
1
0.0009
1
308.15
5
2
1.40467
6
3
0.62492
5
1
0.0166
3
1
0.0009
1
308.15
5
2
1.59891
6
3
0.70717
5
1
0.0208
3
1
0.0013
1
308.15
5
2
1.79755
6
3
0.7903
5
1
0.0286
3
1
0.001
1
308.15
5
2
1.98135
6
3
0.86634
5
1
0.0311
3
1
0.001
1
308.15
5
2
2.50057
6
3
1.07674
6
1
0.0456
3
1
0.0011
1
308.15
5
2
3.01075
6
3
1.27732
6
1
0.06
3
1
0.0012
2
2
1
4
1
Principal objective of the work
VN
TRC
6/17/2009
1
Molar enthalpy of dilution, kJ/mol
Flow calorimetry
Liquid
Direct value, X
4
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Pressure, kPa
Liquid
101.325
6
1
Temperature, K
Liquid
2
Initial molality of solute, mol/kg
Liquid
3
Final molality of solute, mol/kg
Liquid
1
293.15
5
2
0.19881
5
3
0.09166
4
1
0.0093
2
1
0.0009
1
293.15
5
2
0.39565
5
3
0.18104
5
1
0.0517
3
1
0.0012
1
293.15
5
2
0.59944
5
3
0.27214
5
1
0.0853
3
1
0.0014
1
293.15
5
2
0.79914
5
3
0.36006
5
1
0.1199
4
1
0.0018
1
293.15
5
2
1.00087
6
3
0.44752
5
1
0.1469
4
1
0.0019
1
293.15
5
2
1.20091
6
3
0.53295
5
1
0.176
4
1
0.0025
1
293.15
5
2
1.40036
6
3
0.61687
5
1
0.2173
4
1
0.0033
1
293.15
5
2
1.59868
6
3
0.69908
5
1
0.2467
4
1
0.0027
1
293.15
5
2
1.86498
6
3
0.80761
5
1
0.2906
4
1
0.003
1
293.15
5
2
1.99808
6
3
0.86107
5
1
0.312
4
1
0.0032
1
293.15
5
2
2.49729
6
3
1.05705
6
1
0.3959
4
1
0.0038
1
293.15
5
2
2.99731
6
3
1.24648
6
1
0.4848
4
1
0.0045
1
298.15
5
2
0.19999
5
3
0.09833
4
1
0.0177
3
1
0.0009
1
298.15
5
2
0.39498
5
3
0.19281
5
1
0.0472
3
1
0.0012
1
298.15
5
2
0.59987
5
3
0.29067
5
1
0.0709
3
1
0.0013
1
298.15
5
2
0.79946
5
3
0.38461
5
1
0.1131
4
1
0.0017
1
298.15
5
2
0.97441
5
3
0.46585
5
1
0.1251
4
1
0.0018
1
298.15
5
2
1.18564
6
3
0.56261
5
1
0.157
4
1
0.002
1
298.15
5
2
1.39703
6
3
0.67228
5
1
0.189
4
1
0.0022
1
298.15
5
2
1.58879
6
3
0.75955
5
1
0.217
4
1
0.0025
1
298.15
5
2
1.79515
6
3
0.85219
5
1
0.2493
4
1
0.0027
1
298.15
5
2
2.00072
6
3
0.9432
5
1
0.282
4
1
0.003
1
298.15
5
2
2.50644
6
3
1.1618
6
1
0.3596
4
1
0.0036
1
298.15
5
2
3.00045
6
3
1.36838
6
1
0.4338
4
1
0.0041
1
303.15
5
2
0.20127
5
3
0.10101
5
1
0.0176
3
1
0.0009
1
303.15
5
2
0.40466
5
3
0.20162
5
1
0.0425
3
1
0.0011
1
303.15
5
2
0.5421
5
3
0.26878
5
1
0.0609
3
1
0.0013
1
303.15
5
2
0.79523
5
3
0.39077
5
1
0.0963
3
1
0.0015
1
303.15
5
2
1.01228
6
3
0.49367
5
1
0.1212
4
1
0.0017
1
303.15
5
2
1.19568
6
3
0.5794
5
1
0.1508
4
1
0.002
1
303.15
5
2
1.39984
6
3
0.67357
5
1
0.1707
4
1
0.0021
1
303.15
5
2
1.59787
6
3
0.76365
5
1
0.2088
4
1
0.0024
1
303.15
5
2
1.79662
6
3
0.85285
5
1
0.2386
4
1
0.0026
1
303.15
5
2
2.0019
6
3
0.94371
5
1
0.2649
4
1
0.0028
1
303.15
5
2
2.50329
6
3
1.16046
6
1
0.3378
4
1
0.0034
1
303.15
5
2
2.9268
6
3
1.33801
6
1
0.3965
4
1
0.0039
1
308.15
5
2
0.2002
5
3
0.0923
4
1
0.011
3
1
0.0009
1
308.15
5
2
0.39954
5
3
0.18279
5
1
0.0433
3
1
0.0013
1
308.15
5
2
0.60036
5
3
0.27255
5
1
0.0633
3
1
0.0016
1
308.15
5
2
0.79921
5
3
0.36009
5
1
0.0967
3
1
0.0024
1
308.15
5
2
1.00102
6
3
0.44759
5
1
0.1109
4
1
0.003
1
308.15
5
2
1.1995
6
3
0.53235
5
1
0.1444
4
1
0.0021
1
308.15
5
2
1.3941
6
3
0.61425
5
1
0.1711
4
1
0.0022
1
308.15
5
2
1.59908
6
3
0.69925
5
1
0.2029
4
1
0.0024
1
308.15
5
2
1.7997
6
3
0.7812
5
1
0.2343
4
1
0.0026
1
308.15
5
2
1.99634
6
3
0.86037
5
1
0.2633
4
1
0.0028
1
308.15
5
2
2.49617
6
3
1.05662
6
1
0.3381
4
1
0.0035
1
308.15
5
2
2.99494
6
3
1.2456
6
1
0.4247
4
1
0.0041
3
3
1
4
1
Principal objective of the work
VN
TRC
6/17/2009
1
Molar enthalpy of dilution, kJ/mol
Flow calorimetry
Liquid
Direct value, X
4
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Pressure, kPa
Liquid
101.325
6
1
Temperature, K
Liquid
2
Initial molality of solute, mol/kg
Liquid
3
Final molality of solute, mol/kg
Liquid
1
293.15
5
2
0.19966
5
3
0.09192
4
1
0.0637
3
1
0.0013
1
293.15
5
2
0.40225
5
3
0.18346
5
1
0.1021
4
1
0.0016
1
293.15
5
2
0.60003
5
3
0.27121
5
1
0.1842
4
1
0.0022
1
293.15
5
2
0.80005
5
3
0.35837
5
1
0.2759
4
1
0.0029
1
293.15
5
2
1.00205
6
3
0.44481
5
1
0.3492
4
1
0.0035
1
293.15
5
2
1.19966
6
3
0.52788
5
1
0.4116
4
1
0.0067
1
293.15
5
2
1.39878
6
3
0.61013
5
1
0.5178
4
1
0.0048
1
293.15
5
2
1.59992
6
3
0.69177
5
1
0.5974
4
1
0.0054
1
293.15
5
2
1.79434
6
3
0.76934
5
1
0.6498
4
1
0.0074
1
293.15
5
2
1.99506
6
3
0.84807
5
1
0.7265
4
1
0.0064
1
293.15
5
2
2.50067
6
3
1.04055
6
1
0.9436
4
1
0.0081
1
293.15
5
2
2.99953
6
3
1.22265
6
1
1.1572
5
1
0.0097
1
298.15
5
2
0.20002
5
3
0.09208
4
1
0.039
3
1
0.0011
1
298.15
5
2
0.4031
5
3
0.18384
5
1
0.1155
4
1
0.0017
1
298.15
5
2
0.6004
5
3
0.27138
5
1
0.1878
4
1
0.0022
1
298.15
5
2
0.80021
5
3
0.35843
5
1
0.2723
4
1
0.0029
1
298.15
5
2
0.99926
5
3
0.44363
5
1
0.3423
4
1
0.0034
1
298.15
5
2
1.19455
6
3
0.57177
5
1
0.3968
4
1
0.0039
1
298.15
5
2
1.39796
6
3
0.60979
5
1
0.5014
4
1
0.0047
1
298.15
5
2
1.59985
6
3
0.69174
5
1
0.5831
4
1
0.0053
1
298.15
5
2
1.80011
6
3
0.84067
5
1
0.625
4
1
0.0056
1
298.15
5
2
1.99916
6
3
0.84967
5
1
0.7315
4
1
0.0064
1
298.15
5
2
2.49596
6
3
1.0388
6
1
0.9458
4
1
0.0081
1
298.15
5
2
2.99875
6
3
1.22238
6
1
1.1417
5
1
0.0096
1
303.15
5
2
0.20019
5
3
0.10042
5
1
0.0457
3
1
0.0011
1
303.15
5
2
0.39478
5
3
0.1964
5
1
0.1026
4
1
0.0016
1
303.15
5
2
0.59961
5
3
0.29573
5
1
0.166
4
1
0.0021
1
303.15
5
2
0.80364
5
3
0.393
5
1
0.2332
4
1
0.0026
1
303.15
5
2
0.99731
5
3
0.4838
5
1
0.2984
4
1
0.0031
1
303.15
5
2
1.20321
6
3
0.57876
5
1
0.373
4
1
0.0037
1
303.15
5
2
1.40279
6
3
0.66929
5
1
0.4458
4
1
0.0042
1
303.15
5
2
1.60044
6
3
0.75751
5
1
0.5161
4
1
0.0048
1
303.15
5
2
1.80114
6
3
0.84566
5
1
0.5887
4
1
0.0053
1
303.15
5
2
1.99933
6
3
0.93134
5
1
0.6602
4
1
0.0059
1
303.15
5
2
2.43853
6
3
1.11648
6
1
0.8052
4
1
0.007
1
303.15
5
2
2.99873
6
3
1.34362
6
1
0.9905
4
1
0.0085
1
308.15
5
2
0.19962
5
3
0.0919
4
1
0.0442
3
1
0.0011
1
308.15
5
2
0.40081
5
3
0.18282
5
1
0.1001
4
1
0.0017
1
308.15
5
2
0.60133
5
3
0.27178
5
1
0.1737
4
1
0.0021
1
308.15
5
2
0.80096
5
3
0.35876
5
1
0.2487
4
1
0.0029
1
308.15
5
2
0.99908
5
3
0.44355
5
1
0.3119
4
1
0.0034
1
308.15
5
2
1.19734
6
3
0.52691
5
1
0.3856
4
1
0.0038
1
308.15
5
2
1.40013
6
3
0.61068
5
1
0.46
4
1
0.0043
1
308.15
5
2
1.60028
6
3
0.69192
5
1
0.5323
4
1
0.0049
1
308.15
5
2
1.79931
6
3
0.77131
5
1
0.6038
4
1
0.0057
1
308.15
5
2
1.99751
6
3
0.84903
5
1
0.6679
4
1
0.0059
1
308.15
5
2
2.49889
6
3
1.03989
6
1
0.8485
4
1
0.0075
1
308.15
5
2
2.9906
6
3
1.21946
6
1
0.9964
4
1
0.0085