Mixture of Urea, tetramethyl- + Water

Datasets

1. Molar enthalpy (2)
2. ρ_l - Mass density, kg/m3 (12)
3. c_sound,fluid - Speed of Sound, m/s (6)

Molar enthalpy of dilution, kJ/mol [ref]

Operational conditions:

• Temperature, K = 298.15 (Liquid)
• Pressure, kPa = 101.325 (Liquid)

Fixed		Measured
Initial molality of solute, mol/kg - Liquid	Final molality of solute, mol/kg - Liquid	Molar enthalpy of dilution, kJ/mol - Liquid
1.0207	0.0079	-0.0011
1.0207	0.0086	-0.0011
2.03	0.0149	-0.0040
2.03	0.0189	-0.0051
4.0192	0.0252	-0.0159
4.0192	0.0392	-0.0251

Molar enthalpy of dilution, kJ/mol [ref]

Operational conditions:

• Temperature, K = 298.15 (Liquid)
• Pressure, kPa = 101.325 (Liquid)

Fixed		Measured
Initial molality of solute, mol/kg - Liquid	Final molality of solute, mol/kg - Liquid	Molar enthalpy of dilution, kJ/mol - Liquid
1.0207	0.0079	-0.0011
1.0207	0.0086	-0.0011
2.03	0.0149	-0.0040
2.03	0.0189	-0.0051
4.0192	0.0252	-0.0159
4.0192	0.0392	-0.0251

Mass density, kg/m3 [ref]

Operational conditions:

• Temperature, K = 298.15 (Liquid)
• Pressure, kPa = 101 (Liquid)

Molality, mol/kg of Water (2) - Liquid	Mass density, kg/m3 - Liquid
0.0000	963.01
0.1665	963.76
0.3794	964.71
0.4585	965.06
0.5331	965.39
0.6227	965.79
0.6963	966.12
0.8013	966.58
0.8839	966.95

Mass density, kg/m3 [ref]

Operational condition: Pressure, kPa = 101 (Liquid)

Fixed		Measured
Molality, mol/kg of Urea, tetramethyl- (1) - Liquid	Temperature, K - Liquid	Mass density, kg/m3 - Liquid
0.0000	288.15	999.09
0.0589	288.15	999.174
0.1190	288.15	999.272
0.1794	288.15	999.383
0.2395	288.15	999.512
0.3011	288.15	999.653
0.0000	293.15	998.192
0.0589	293.15	998.255
0.1190	293.15	998.329
0.1794	293.15	998.419
0.2395	293.15	998.518
0.3011	293.15	998.632
0.0000	298.15	997.03
0.0589	298.15	997.075
0.1190	298.15	997.129
0.1794	298.15	997.195
0.2395	298.15	997.269
0.3011	298.15	997.357
0.0000	303.15	995.628
0.0589	303.15	995.657
0.1190	303.15	995.689
0.1794	303.15	995.734
0.2395	303.15	995.787
0.3011	303.15	995.851
0.0000	308.15	994.01
0.0589	308.15	994.022
0.1190	308.15	994.033
0.1794	308.15	994.062
0.2395	308.15	994.089
0.3011	308.15	994.131

Mass density, kg/m3 [ref]

Operational condition: Pressure, kPa = 100 (Liquid)

Fixed		Measured
Temperature, K - Liquid	Molality, mol/kg of Urea, tetramethyl- (1) - Liquid	Mass density, kg/m3 - Liquid
288.15	0.0531	999.175
288.15	0.0847	999.224
288.15	0.1165	999.275
288.15	0.1526	999.338
288.15	0.2129	999.46
288.15	0.2671	999.579
288.15	0.3243	999.719
298.15	0.0531	997.09
298.15	0.0847	997.115
298.15	0.1165	997.14
298.15	0.1526	997.175
298.15	0.2129	997.249
298.15	0.2671	997.324
298.15	0.3243	997.417
308.15	0.0531	994.048
308.15	0.0847	994.054
308.15	0.1165	994.06
308.15	0.1526	994.068
308.15	0.2129	994.099
308.15	0.2671	994.135
308.15	0.3243	994.179

Mass density, kg/m3 [ref]

Operational condition: Pressure, kPa = 101 (Liquid)

Fixed		Measured
Temperature, K - Liquid	Molality, mol/kg of Urea, tetramethyl- (1) - Liquid	Mass density, kg/m3 - Liquid
278.15	0.0000	999.965
278.15	0.0576	1000.12
278.15	0.0883	1000.2
278.15	0.1309	1000.32
278.15	0.1434	1000.35
278.15	0.2763	1000.79
278.15	0.4159	1001.29
278.15	0.5882	1001.97
278.15	0.7592	1002.72
278.15	0.9786	1003.73
278.15	1.1038	1004.32
278.15	1.3398	1005.47
278.15	1.3481	1005.51
278.15	1.6776	1007.1
278.15	1.7449	1007.42
288.15	0.0000	999.101
288.15	0.0576	999.2
288.15	0.0883	999.26
288.15	0.1309	999.34
288.15	0.1434	999.36
288.15	0.2763	999.66
288.15	0.4159	1000.02
288.15	0.5882	1000.5
288.15	0.7592	1001.05
288.15	0.9786	1001.79
288.15	1.1038	1002.23
288.15	1.3398	1003.08
288.15	1.3481	1003.12
288.15	1.6776	1004.31
288.15	1.7449	1004.55
298.15	0.0000	997.047
298.15	0.0576	997.1
298.15	0.0883	997.13
298.15	0.1309	997.18
298.15	0.1434	997.2
298.15	0.2763	997.38
298.15	0.4159	997.61
298.15	0.5882	997.94
298.15	0.7592	998.31
298.15	0.9786	998.84
298.15	1.1038	999.15
298.15	1.3398	999.77
298.15	1.3481	999.79
298.15	1.6776	1000.65
298.15	1.7449	1000.82
308.15	0.0000	994.035
308.15	0.0576	994.05
308.15	0.0883	994.06
308.15	0.1309	994.08
308.15	0.1434	994.08
308.15	0.2763	994.17
308.15	0.4159	994.29
308.15	0.5882	994.48
308.15	0.7592	994.7
308.15	0.9786	995.04
308.15	1.1038	995.24
308.15	1.3398	995.64
308.15	1.3481	995.66
308.15	1.6776	996.23
308.15	1.7449	996.35
318.15	0.0000	990.216
318.15	0.0576	990.19
318.15	0.0883	990.18
318.15	0.1309	990.17
318.15	0.1434	990.17
318.15	0.2763	990.17
318.15	0.4159	990.18
318.15	0.5882	990.24
318.15	0.7592	990.33
318.15	0.9786	990.47
318.15	1.1038	990.57
318.15	1.3398	990.79
318.15	1.3481	990.8
318.15	1.6776	991.13
318.15	1.7449	991.2

Mass density, kg/m3 [ref]

Operational condition: Pressure, kPa = 99.6 (Liquid)

Fixed		Measured
Temperature, K - Liquid	Molality, mol/kg of Urea, tetramethyl- (1) - Liquid	Mass density, kg/m3 - Liquid
288.15	0.0989	999.26
288.15	0.2165	999.49
288.15	0.2912	999.66
288.15	0.3857	999.88
288.15	0.4822	1000.14
288.15	0.5938	1000.46
288.15	0.7705	1001.0
288.15	0.9762	1001.7
288.15	1.1052	1002.15
288.15	1.232	1002.62
288.15	1.3805	1003.16
288.15	1.5147	1003.66
288.15	1.6857	1004.28
288.15	1.862	1004.92
288.15	1.9787	1005.33
298.15	0.0989	997.14
298.15	0.2165	997.28
298.15	0.2912	997.38
298.15	0.3857	997.53
298.15	0.4822	997.7
298.15	0.5938	997.91
298.15	0.7705	998.29
298.15	0.9762	998.78
298.15	1.1052	999.1
298.15	1.232	999.43
298.15	1.3805	999.82
298.15	1.5147	1000.18
298.15	1.6857	1000.63
298.15	1.862	1001.09
298.15	1.9787	1001.38
308.15	0.0989	994.06
308.15	0.2165	994.11
308.15	0.2912	994.16
308.15	0.3857	994.24
308.15	0.4822	994.34
308.15	0.5938	994.46
308.15	0.7705	994.69
308.15	0.9762	995.0
308.15	1.1052	995.21
308.15	1.232	995.43
308.15	1.3805	995.68
308.15	1.5147	995.92
308.15	1.6857	996.22
308.15	1.862	996.53
308.15	1.9787	996.72
318.15	0.0989	990.19
318.15	0.2165	990.17
318.15	0.2912	990.16
318.15	0.3857	990.17
318.15	0.4822	990.2
318.15	0.5938	990.24
318.15	0.7705	990.33
318.15	0.9762	990.48
318.15	1.1052	990.58
318.15	1.232	990.7
318.15	1.3805	990.83
318.15	1.5147	990.96
318.15	1.6857	991.12
318.15	1.862	991.29
318.15	1.9787	991.39
328.15	0.0989	985.6
328.15	0.2165	985.51
328.15	0.2912	985.46
328.15	0.3857	985.41
328.15	0.4822	985.37
328.15	0.5938	985.33
328.15	0.7705	985.3
328.15	0.9762	985.3
328.15	1.1052	985.31
328.15	1.232	985.33
328.15	1.3805	985.36
328.15	1.5147	985.39
328.15	1.6857	985.43
328.15	1.862	985.47
328.15	1.9787	985.5

Mass density, kg/m3 [ref]

Operational condition: Pressure, kPa = 101 (Liquid)

Fixed		Measured
Mole fraction of Urea, tetramethyl- (1) - Liquid	Temperature, K - Liquid	Mass density, kg/m3 - Liquid
0.0000	274.15	999.902
0.0000	275.15	999.943
0.0000	276.15	999.967
0.0000	277.15	999.975
0.0000	278.15	999.967
0.0000	279.18	999.943
0.0000	280.15	999.905
0.0000	281.15	999.85
0.0000	282.15	999.784
0.0000	283.15	999.703
0.0000	288.15	999.103
0.0000	298.15	997.048
0.0000	308.15	994.035
0.0009	274.15	1000.033
0.0009	275.15	1000.06
0.0009	276.15	1000.086
0.0009	277.15	1000.082
0.0009	278.15	1000.074
0.0009	279.18	1000.041
0.0009	280.15	1000.0
0.0009	281.15	999.936
0.0009	282.15	999.869
0.0009	283.15	999.784
0.0009	288.15	999.158
0.0009	298.15	997.079
0.0009	308.15	994.03
0.0019	274.15	1000.186
0.0019	275.15	1000.201
0.0019	276.15	1000.22
0.0019	277.15	1000.208
0.0019	278.15	1000.196
0.0019	279.18	1000.16
0.0019	280.15	1000.108
0.0019	281.15	1000.04
0.0019	282.15	999.97
0.0019	283.15	999.88
0.0019	288.15	999.227
0.0019	298.15	997.119
0.0019	308.15	994.035
0.0046	274.15	1000.697
0.0046	275.15	1000.7
0.0046	276.15	1000.688
0.0046	277.15	1000.652
0.0046	278.15	1000.631
0.0046	279.18	1000.581
0.0046	280.15	1000.519
0.0046	281.15	1000.431
0.0046	282.15	1000.34
0.0046	283.15	1000.236
0.0046	288.15	999.51
0.0046	298.15	997.289
0.0046	308.15	994.088
0.0092	274.15	1001.741
0.0092	275.15	1001.699
0.0092	276.15	1001.663
0.0092	277.15	1001.601
0.0092	278.15	1001.546
0.0092	279.18	1001.453
0.0092	280.15	1001.372
0.0092	281.15	1001.25
0.0092	282.15	1001.141
0.0092	283.15	1001.003
0.0092	288.15	1000.128
0.0092	298.15	997.677
0.0092	308.15	994.319
0.0183	274.15	1004.219
0.0183	275.15	1004.105
0.0183	276.15	1004.012
0.0183	277.15	1003.873
0.0183	278.15	1003.757
0.0183	279.18	1003.592
0.0183	280.15	1003.454
0.0183	281.15	1003.273
0.0183	282.15	1003.135
0.0183	283.15	1002.906
0.0183	288.15	1001.795
0.0183	298.15	998.817
0.0183	308.15	994.962
0.0255	274.15	1006.386
0.0255	275.15	1006.193
0.0255	276.15	1006.052
0.0255	277.15	1005.903
0.0255	278.15	1005.685
0.0255	279.18	1005.467
0.0255	280.15	1005.274
0.0255	281.15	1005.047
0.0255	282.15	1004.857
0.0255	283.15	1004.571
0.0255	288.15	1003.225
0.0255	298.15	999.88
0.0255	308.15	995.682
0.0326	274.15	1008.56
0.0326	275.15	1008.322
0.0326	276.15	1008.093
0.0326	277.15	1007.898
0.0326	278.15	1007.616
0.0326	279.18	1007.345
0.0326	280.15	1007.099
0.0326	281.15	1006.827
0.0326	282.15	1006.575
0.0326	283.15	1006.286
0.0326	288.15	1004.67
0.0326	298.15	1000.924
0.0326	308.15	996.403
0.0396	274.15	1010.66
0.0396	275.15	1010.356
0.0396	276.15	1010.08
0.0396	277.15	1009.835
0.0396	278.15	1009.49
0.0396	279.18	1009.167
0.0396	280.15	1008.873
0.0396	281.15	1008.551
0.0396	282.15	1008.253
0.0396	283.15	1007.861
0.0396	288.15	1006.092
0.0396	298.15	1001.944
0.0396	308.15	997.067
0.0465	274.15	1012.669
0.0465	275.15	1012.392
0.0465	276.15	1011.974
0.0465	277.15	1011.679
0.0465	278.15	1011.268
0.0465	279.18	1010.919
0.0465	280.15	1010.576
0.0465	281.15	1010.205
0.0465	282.15	1009.835
0.0465	283.15	1009.422
0.0465	288.15	1007.435
0.0465	298.15	1002.906
0.0465	308.15	997.696
0.0534	274.15	1014.595
0.0534	275.15	1014.188
0.0534	276.15	1013.792
0.0534	277.15	1013.462
0.0534	278.15	1012.999
0.0534	279.18	1012.62
0.0534	280.15	1012.207
0.0534	281.15	1011.803
0.0534	282.15	1011.383
0.0534	283.15	1010.915
0.0534	288.15	1008.699
0.0534	298.15	1003.848
0.0534	308.15	998.338
0.0660	274.15	1017.879
0.0660	275.15	1017.35
0.0660	276.15	1016.88
0.0660	277.15	1016.415
0.0660	278.15	1015.918
0.0660	279.18	1015.428
0.0660	280.15	1014.956
0.0660	281.15	1014.475
0.0660	282.15	1013.961
0.0660	283.15	1013.424
0.0660	288.15	1010.914
0.0660	298.15	1005.436
0.0660	308.15	999.385

Mass density, kg/m3 [ref]

Operational conditions:

• Temperature, K = 298.15 (Liquid)
• Pressure, kPa = 101 (Liquid)

Molality, mol/kg of Water (2) - Liquid	Mass density, kg/m3 - Liquid
0.0000	963.01
0.1665	963.76
0.3794	964.71
0.4585	965.06
0.5331	965.39
0.6227	965.79
0.6963	966.12
0.8013	966.58
0.8839	966.95

Mass density, kg/m3 [ref]

Operational condition: Pressure, kPa = 101 (Liquid)

Fixed		Measured
Molality, mol/kg of Urea, tetramethyl- (1) - Liquid	Temperature, K - Liquid	Mass density, kg/m3 - Liquid
0.0000	288.15	999.09
0.0589	288.15	999.174
0.1190	288.15	999.272
0.1794	288.15	999.383
0.2395	288.15	999.512
0.3011	288.15	999.653
0.0000	293.15	998.192
0.0589	293.15	998.255
0.1190	293.15	998.329
0.1794	293.15	998.419
0.2395	293.15	998.518
0.3011	293.15	998.632
0.0000	298.15	997.03
0.0589	298.15	997.075
0.1190	298.15	997.129
0.1794	298.15	997.195
0.2395	298.15	997.269
0.3011	298.15	997.357
0.0000	303.15	995.628
0.0589	303.15	995.657
0.1190	303.15	995.689
0.1794	303.15	995.734
0.2395	303.15	995.787
0.3011	303.15	995.851
0.0000	308.15	994.01
0.0589	308.15	994.022
0.1190	308.15	994.033
0.1794	308.15	994.062
0.2395	308.15	994.089
0.3011	308.15	994.131

Mass density, kg/m3 [ref]

Operational condition: Pressure, kPa = 100 (Liquid)

Fixed		Measured
Temperature, K - Liquid	Molality, mol/kg of Urea, tetramethyl- (1) - Liquid	Mass density, kg/m3 - Liquid
288.15	0.0531	999.175
288.15	0.0847	999.224
288.15	0.1165	999.275
288.15	0.1526	999.338
288.15	0.2129	999.46
288.15	0.2671	999.579
288.15	0.3243	999.719
298.15	0.0531	997.09
298.15	0.0847	997.115
298.15	0.1165	997.14
298.15	0.1526	997.175
298.15	0.2129	997.249
298.15	0.2671	997.324
298.15	0.3243	997.417
308.15	0.0531	994.048
308.15	0.0847	994.054
308.15	0.1165	994.06
308.15	0.1526	994.068
308.15	0.2129	994.099
308.15	0.2671	994.135
308.15	0.3243	994.179

Mass density, kg/m3 [ref]

Operational condition: Pressure, kPa = 101 (Liquid)

Fixed		Measured
Temperature, K - Liquid	Molality, mol/kg of Urea, tetramethyl- (1) - Liquid	Mass density, kg/m3 - Liquid
278.15	0.0000	999.965
278.15	0.0576	1000.12
278.15	0.0883	1000.2
278.15	0.1309	1000.32
278.15	0.1434	1000.35
278.15	0.2763	1000.79
278.15	0.4159	1001.29
278.15	0.5882	1001.97
278.15	0.7592	1002.72
278.15	0.9786	1003.73
278.15	1.1038	1004.32
278.15	1.3398	1005.47
278.15	1.3481	1005.51
278.15	1.6776	1007.1
278.15	1.7449	1007.42
288.15	0.0000	999.101
288.15	0.0576	999.2
288.15	0.0883	999.26
288.15	0.1309	999.34
288.15	0.1434	999.36
288.15	0.2763	999.66
288.15	0.4159	1000.02
288.15	0.5882	1000.5
288.15	0.7592	1001.05
288.15	0.9786	1001.79
288.15	1.1038	1002.23
288.15	1.3398	1003.08
288.15	1.3481	1003.12
288.15	1.6776	1004.31
288.15	1.7449	1004.55
298.15	0.0000	997.047
298.15	0.0576	997.1
298.15	0.0883	997.13
298.15	0.1309	997.18
298.15	0.1434	997.2
298.15	0.2763	997.38
298.15	0.4159	997.61
298.15	0.5882	997.94
298.15	0.7592	998.31
298.15	0.9786	998.84
298.15	1.1038	999.15
298.15	1.3398	999.77
298.15	1.3481	999.79
298.15	1.6776	1000.65
298.15	1.7449	1000.82
308.15	0.0000	994.035
308.15	0.0576	994.05
308.15	0.0883	994.06
308.15	0.1309	994.08
308.15	0.1434	994.08
308.15	0.2763	994.17
308.15	0.4159	994.29
308.15	0.5882	994.48
308.15	0.7592	994.7
308.15	0.9786	995.04
308.15	1.1038	995.24
308.15	1.3398	995.64
308.15	1.3481	995.66
308.15	1.6776	996.23
308.15	1.7449	996.35
318.15	0.0000	990.216
318.15	0.0576	990.19
318.15	0.0883	990.18
318.15	0.1309	990.17
318.15	0.1434	990.17
318.15	0.2763	990.17
318.15	0.4159	990.18
318.15	0.5882	990.24
318.15	0.7592	990.33
318.15	0.9786	990.47
318.15	1.1038	990.57
318.15	1.3398	990.79
318.15	1.3481	990.8
318.15	1.6776	991.13
318.15	1.7449	991.2

Mass density, kg/m3 [ref]

Operational condition: Pressure, kPa = 99.6 (Liquid)

Fixed		Measured
Temperature, K - Liquid	Molality, mol/kg of Urea, tetramethyl- (1) - Liquid	Mass density, kg/m3 - Liquid
288.15	0.0989	999.26
288.15	0.2165	999.49
288.15	0.2912	999.66
288.15	0.3857	999.88
288.15	0.4822	1000.14
288.15	0.5938	1000.46
288.15	0.7705	1001.0
288.15	0.9762	1001.7
288.15	1.1052	1002.15
288.15	1.232	1002.62
288.15	1.3805	1003.16
288.15	1.5147	1003.66
288.15	1.6857	1004.28
288.15	1.862	1004.92
288.15	1.9787	1005.33
298.15	0.0989	997.14
298.15	0.2165	997.28
298.15	0.2912	997.38
298.15	0.3857	997.53
298.15	0.4822	997.7
298.15	0.5938	997.91
298.15	0.7705	998.29
298.15	0.9762	998.78
298.15	1.1052	999.1
298.15	1.232	999.43
298.15	1.3805	999.82
298.15	1.5147	1000.18
298.15	1.6857	1000.63
298.15	1.862	1001.09
298.15	1.9787	1001.38
308.15	0.0989	994.06
308.15	0.2165	994.11
308.15	0.2912	994.16
308.15	0.3857	994.24
308.15	0.4822	994.34
308.15	0.5938	994.46
308.15	0.7705	994.69
308.15	0.9762	995.0
308.15	1.1052	995.21
308.15	1.232	995.43
308.15	1.3805	995.68
308.15	1.5147	995.92
308.15	1.6857	996.22
308.15	1.862	996.53
308.15	1.9787	996.72
318.15	0.0989	990.19
318.15	0.2165	990.17
318.15	0.2912	990.16
318.15	0.3857	990.17
318.15	0.4822	990.2
318.15	0.5938	990.24
318.15	0.7705	990.33
318.15	0.9762	990.48
318.15	1.1052	990.58
318.15	1.232	990.7
318.15	1.3805	990.83
318.15	1.5147	990.96
318.15	1.6857	991.12
318.15	1.862	991.29
318.15	1.9787	991.39
328.15	0.0989	985.6
328.15	0.2165	985.51
328.15	0.2912	985.46
328.15	0.3857	985.41
328.15	0.4822	985.37
328.15	0.5938	985.33
328.15	0.7705	985.3
328.15	0.9762	985.3
328.15	1.1052	985.31
328.15	1.232	985.33
328.15	1.3805	985.36
328.15	1.5147	985.39
328.15	1.6857	985.43
328.15	1.862	985.47
328.15	1.9787	985.5

Mass density, kg/m3 [ref]

Operational condition: Pressure, kPa = 101 (Liquid)

Fixed		Measured
Mole fraction of Urea, tetramethyl- (1) - Liquid	Temperature, K - Liquid	Mass density, kg/m3 - Liquid
0.0000	274.15	999.902
0.0000	275.15	999.943
0.0000	276.15	999.967
0.0000	277.15	999.975
0.0000	278.15	999.967
0.0000	279.18	999.943
0.0000	280.15	999.905
0.0000	281.15	999.85
0.0000	282.15	999.784
0.0000	283.15	999.703
0.0000	288.15	999.103
0.0000	298.15	997.048
0.0000	308.15	994.035
0.0009	274.15	1000.033
0.0009	275.15	1000.06
0.0009	276.15	1000.086
0.0009	277.15	1000.082
0.0009	278.15	1000.074
0.0009	279.18	1000.041
0.0009	280.15	1000.0
0.0009	281.15	999.936
0.0009	282.15	999.869
0.0009	283.15	999.784
0.0009	288.15	999.158
0.0009	298.15	997.079
0.0009	308.15	994.03
0.0019	274.15	1000.186
0.0019	275.15	1000.201
0.0019	276.15	1000.22
0.0019	277.15	1000.208
0.0019	278.15	1000.196
0.0019	279.18	1000.16
0.0019	280.15	1000.108
0.0019	281.15	1000.04
0.0019	282.15	999.97
0.0019	283.15	999.88
0.0019	288.15	999.227
0.0019	298.15	997.119
0.0019	308.15	994.035
0.0046	274.15	1000.697
0.0046	275.15	1000.7
0.0046	276.15	1000.688
0.0046	277.15	1000.652
0.0046	278.15	1000.631
0.0046	279.18	1000.581
0.0046	280.15	1000.519
0.0046	281.15	1000.431
0.0046	282.15	1000.34
0.0046	283.15	1000.236
0.0046	288.15	999.51
0.0046	298.15	997.289
0.0046	308.15	994.088
0.0092	274.15	1001.741
0.0092	275.15	1001.699
0.0092	276.15	1001.663
0.0092	277.15	1001.601
0.0092	278.15	1001.546
0.0092	279.18	1001.453
0.0092	280.15	1001.372
0.0092	281.15	1001.25
0.0092	282.15	1001.141
0.0092	283.15	1001.003
0.0092	288.15	1000.128
0.0092	298.15	997.677
0.0092	308.15	994.319
0.0183	274.15	1004.219
0.0183	275.15	1004.105
0.0183	276.15	1004.012
0.0183	277.15	1003.873
0.0183	278.15	1003.757
0.0183	279.18	1003.592
0.0183	280.15	1003.454
0.0183	281.15	1003.273
0.0183	282.15	1003.135
0.0183	283.15	1002.906
0.0183	288.15	1001.795
0.0183	298.15	998.817
0.0183	308.15	994.962
0.0255	274.15	1006.386
0.0255	275.15	1006.193
0.0255	276.15	1006.052
0.0255	277.15	1005.903
0.0255	278.15	1005.685
0.0255	279.18	1005.467
0.0255	280.15	1005.274
0.0255	281.15	1005.047
0.0255	282.15	1004.857
0.0255	283.15	1004.571
0.0255	288.15	1003.225
0.0255	298.15	999.88
0.0255	308.15	995.682
0.0326	274.15	1008.56
0.0326	275.15	1008.322
0.0326	276.15	1008.093
0.0326	277.15	1007.898
0.0326	278.15	1007.616
0.0326	279.18	1007.345
0.0326	280.15	1007.099
0.0326	281.15	1006.827
0.0326	282.15	1006.575
0.0326	283.15	1006.286
0.0326	288.15	1004.67
0.0326	298.15	1000.924
0.0326	308.15	996.403
0.0396	274.15	1010.66
0.0396	275.15	1010.356
0.0396	276.15	1010.08
0.0396	277.15	1009.835
0.0396	278.15	1009.49
0.0396	279.18	1009.167
0.0396	280.15	1008.873
0.0396	281.15	1008.551
0.0396	282.15	1008.253
0.0396	283.15	1007.861
0.0396	288.15	1006.092
0.0396	298.15	1001.944
0.0396	308.15	997.067
0.0465	274.15	1012.669
0.0465	275.15	1012.392
0.0465	276.15	1011.974
0.0465	277.15	1011.679
0.0465	278.15	1011.268
0.0465	279.18	1010.919
0.0465	280.15	1010.576
0.0465	281.15	1010.205
0.0465	282.15	1009.835
0.0465	283.15	1009.422
0.0465	288.15	1007.435
0.0465	298.15	1002.906
0.0465	308.15	997.696
0.0534	274.15	1014.595
0.0534	275.15	1014.188
0.0534	276.15	1013.792
0.0534	277.15	1013.462
0.0534	278.15	1012.999
0.0534	279.18	1012.62
0.0534	280.15	1012.207
0.0534	281.15	1011.803
0.0534	282.15	1011.383
0.0534	283.15	1010.915
0.0534	288.15	1008.699
0.0534	298.15	1003.848
0.0534	308.15	998.338
0.0660	274.15	1017.879
0.0660	275.15	1017.35
0.0660	276.15	1016.88
0.0660	277.15	1016.415
0.0660	278.15	1015.918
0.0660	279.18	1015.428
0.0660	280.15	1014.956
0.0660	281.15	1014.475
0.0660	282.15	1013.961
0.0660	283.15	1013.424
0.0660	288.15	1010.914
0.0660	298.15	1005.436
0.0660	308.15	999.385

Speed of sound, m/s [ref]

Operational conditions:

• Pressure, kPa = 101 (Liquid)
• Temperature, K = 298.15 (Liquid)

Molality, mol/kg of Water (2) - Liquid	Speed of sound, m/s - Liquid
0.0000	1397.6
0.1665	1401.1
0.3794	1406.5
0.4585	1408.5
0.5331	1410.4
0.6227	1412.6
0.6963	1414.5
0.8013	1417.2
0.8839	1419.3

Speed of sound, m/s [ref]

Operational conditions:

• Pressure, kPa = 101 (Liquid)
• Temperature, K = 298.15 (Liquid)

Molality, mol/kg of Urea, tetramethyl- (1) - Liquid	Speed of sound, m/s - Liquid
0.0589	1500.88
0.1190	1505.12
0.1794	1509.33
0.2395	1513.49
0.3011	1517.72

Speed of sound, m/s [ref]

Operational conditions:

• Pressure, kPa = 100 (Liquid)
• Frequency, MHz = 3 (Liquid)

Fixed		Measured
Temperature, K - Liquid	Molality, mol/kg of Urea, tetramethyl- (1) - Liquid	Speed of sound, m/s - Liquid
288.15	0.0531	1471.48
288.15	0.0847	1474.31
288.15	0.1165	1477.1
288.15	0.1526	1480.23
288.15	0.2129	1485.4
288.15	0.2671	1489.95
288.15	0.3243	1494.64
298.15	0.0531	1500.89
298.15	0.0847	1503.22
298.15	0.1165	1505.47
298.15	0.1526	1508.04
298.15	0.2129	1512.22
298.15	0.2671	1515.93
298.15	0.3243	1519.71
308.15	0.0531	1523.16
308.15	0.0847	1525.01
308.15	0.1165	1526.85
308.15	0.1526	1528.89
308.15	0.2129	1532.25
308.15	0.2671	1535.21
308.15	0.3243	1538.24

Speed of sound, m/s [ref]

Operational conditions:

• Pressure, kPa = 101 (Liquid)
• Temperature, K = 298.15 (Liquid)

Molality, mol/kg of Water (2) - Liquid	Speed of sound, m/s - Liquid
0.0000	1397.6
0.1665	1401.1
0.3794	1406.5
0.4585	1408.5
0.5331	1410.4
0.6227	1412.6
0.6963	1414.5
0.8013	1417.2
0.8839	1419.3

Speed of sound, m/s [ref]

Operational conditions:

• Pressure, kPa = 101 (Liquid)
• Temperature, K = 298.15 (Liquid)

Molality, mol/kg of Urea, tetramethyl- (1) - Liquid	Speed of sound, m/s - Liquid
0.0589	1500.88
0.1190	1505.12
0.1794	1509.33
0.2395	1513.49
0.3011	1517.72

Speed of sound, m/s [ref]

Operational conditions:

• Pressure, kPa = 100 (Liquid)
• Frequency, MHz = 3 (Liquid)

Fixed		Measured
Temperature, K - Liquid	Molality, mol/kg of Urea, tetramethyl- (1) - Liquid	Speed of sound, m/s - Liquid
288.15	0.0531	1471.48
288.15	0.0847	1474.31
288.15	0.1165	1477.1
288.15	0.1526	1480.23
288.15	0.2129	1485.4
288.15	0.2671	1489.95
288.15	0.3243	1494.64
298.15	0.0531	1500.89
298.15	0.0847	1503.22
298.15	0.1165	1505.47
298.15	0.1526	1508.04
298.15	0.2129	1512.22
298.15	0.2671	1515.93
298.15	0.3243	1519.71
308.15	0.0531	1523.16
308.15	0.0847	1525.01
308.15	0.1165	1526.85
308.15	0.1526	1528.89
308.15	0.2129	1532.25
308.15	0.2671	1535.21
308.15	0.3243	1538.24

Sources

• Volumetric and compressibility properties of liquid water as a solute in glycolic, propylene carbonate, and tetramethylurea solutions at T = 298.15 K
• Densimetric and ultrasonic characterization of urea and its derivatives in water
• Effect of temperature and ionic strength on volumetric and acoustic properties of solutions of urea alkyl derivatives in aqueous NaCl
• Volume-related interaction parameters for dilute solutions of tetramethylurea in normal and heavy water between 278.15 K and 318.15 K
• Enthalpy-related interaction parameters in H/D isotopically distinguishable aqueous solutions of tetramethylurea cyclic derivatives at 298.15 K
• Solutions of Urea and Tetramethylurea in Formamide and Water: A Comparative Analysis of Volume Characteristics and Solute-Solute Interaction Parameters at Temperatures from 288.15 to 328.15 K and Ambient Pressure
• Thermal Expansion and Structure of 1,3-Dimethylurea, Tetramethylurea, and Tetrabutylammonium Bromide Aqueous Solutions Derived from Density Measurements