Chemical data page
This page provides supplementary chemical data on n -hexane .
Material Safety Data Sheet
The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet (MSDS ) for this chemical from a reliable source and follow its directions.
Structure and properties
Thermodynamic properties
Phase behavior
Triple point
178.0 K (–95.1 °C), 1.23 Pa
Critical point
507.6 K (234.5 °C), 3020 kPa
Std enthalpy change of fusion , Δfus H o
13 kJ/mol
Std entropy change of fusion , Δfus S o
70 J/(mol·K)
Std enthalpy change of vaporization , Δvap H o
28.85 kJ/mol at 68.8 °C
Std entropy change of vaporization , Δvap S o
? J/(mol·K)
Solid properties
Std enthalpy change of formation , Δf H o solid
? kJ/mol
Standard molar entropy ,S o solid
? J/(mol K)
Heat capacity , cp
? J/(mol K)
Liquid properties
Std enthalpy change of formation , Δf H o liquid
–198.7 kJ/mol
Standard molar entropy ,S o liquid
295 J/(mol K)
Enthalpy of combustion , Δc H o
–4163 kJ/mol
Heat capacity , cp
197.66 J/(mol K)
Gas properties
Std enthalpy change of formation , Δf H o gas
–167.2 kJ/mol
Standard molar entropy ,S o gas
388.82 J/(mol K)
Heat capacity , cp
142.6 J/(mol K) at 25 °C
van der Waals' constants [ 3]
a = 2471 L2 kPa/mol2 b = 0.1735 liter per mole
Vapor pressure of liquid
P in mm Hg
1
10
40
100
400
760
1520
3800
7600
15200
30400
45600
T in °C
–53.9
–25.0
–2.3
15.8
49.6
68.7
93.0
131.7
166.6
209.4
—
—
Table data obtained from CRC Handbook of Chemistry and Physics 44th ed.
log10 of Hexane vapor pressure. Uses formula:
log
e
-->
P
m
m
H
g
=
{\displaystyle \scriptstyle \log _{e}P_{mmHg}=}
log
e
-->
(
760
101.325
)
− − -->
13.99935
log
e
-->
(
T
+
273.15
)
− − -->
7284.572
T
+
273.15
+
105.9605
+
1.410325
× × -->
10
− − -->
5
(
T
+
273.15
)
2
{\displaystyle \scriptstyle \log _{e}({\frac {760}{101.325}})-13.99935\log _{e}(T+273.15)-{\frac {7284.572}{T+273.15}}+105.9605+1.410325\times 10^{-5}(T+273.15)^{2}}
obtained from CHERIC[ 4]
Distillation data
Vapor-Liquid Equilibrium of n -Hexane/Ethanol [ 5] P = 760 mm Hg
BP Temp. °C
% by mole ethanol
liquid
vapor
76.0
99.0
90.5
73.2
98.0
80.7
67.4
94.0
63.5
65.9
92.0
58.0
61.8
84.8
46.8
59.4
75.5
39.5
58.7
66.7
37.0
58.35
54.8
36.0
58.1
41.2
35.0
58.0
33.0
34.0
58.25
27.5
33.0
58.45
23.5
32.5
59.15
10.2
29.0
60.2
4.5
25.5
63.5
1.0
16.0
66.7
0.6
6.5
Vapor-Liquid Equilibrium of n -Hexane/Methanol [ 5] P = 760 mm Hg
BP Temp. °C
% by mole methanol
liquid
vapor
56.9
1.0
30.0
51.3
2.2
41.8
51.2
4.0
43.9
50.5
9.5
47.7
49.9
17.5
49.1
50.0
28.3
49.6
49.9
40.5
49.7
49.0
52.5
50.2
49.9
70.4
50.0
49.9
72.4
50.0
50.2
84.6
51.6
50.1
85.4
51.6
50.2
87.5
51.5
51.4
90.6
55.0
51.2
90.6
55.1
51.7
92.2
56.0
51.6
92.3
56.0
52.8
94.9
61.2
53.8
95.7
63.5
54.7
96.5
66.4
55.8
96.5
69.5
55.6
96.8
69.4
58.2
97.7
76.8
57.9
97.8
75.5
63.0
99.3
93.5
63.5
99.55
95.0
Vapor-Liquid Equilibrium of n -Hexane/n -Heptane [ 5] P = 101.0 kPa
BP Temp. °C
% by mole hexane
liquid
vapor
98.32
0.00
0.00
96.30
3.83
8.52
94.03
9.64
19.86
92.35
13.63
27.31
90.37
19.04
36.00
88.26
24.59
44.07
85.96
31.46
52.58
83.22
39.53
62.36
82.41
43.21
65.34
80.80
48.53
70.30
79.78
51.23
72.70
78.79
55.71
76.22
77.12
61.87
80.74
75.57
68.24
84.95
74.98
70.12
86.15
73.51
76.79
89.93
81.40
81.60
92.40
70.59
89.91
96.37
68.66
100.00
100.00
Spectral data
References
^ Lange's Handbook of Chemistry , 10th ed, pp 1661-1663
^ Lange's Handbook of Chemistry , 10th ed, pp 1669-1674
^ Lange's Handbook of Chemistry 10th ed, pp 1522-1524
^ "Pure Component Properties" (Queriable database) . Chemical Engineering Research Information Center. Retrieved 25 May 2007 .
^ a b c "Binary Vapor-Liquid Equilibrium Data" . Chemical Engineering Research Information Center. Retrieved 25 May 2007 .