tag rule

Critical Point of the Elements from READE

{glossarbot=disable} Critical point- Critical Point of the Elements from READE

ref

Tc(K)

Tc(°C)

Pc(MPa)

Pc(other)

Vc(cm³/mol)

ρc(g/cm³)

1 H hydrogen

use

32.97

-240.18

1.293

 

 

 

CRC.a

32.97

-240.18

1.293

 

65

 

KAL

33.2

 

1.297

 

65.0

 

SMI

 

-239.9

 

13.2 kg/cm²

 

0.0310

1 H hydrogen (equilibrium)

LNG

 

-240.17

1.294

12.77 atm

65.4

0.0308

1 H hydrogen (normal)

LNG

 

-239.91

1.297

12.8 atm

65.0

0.0310

1 H hydrogen-2

KAL

38.2

 

1.65

 

60

 

1 H hydrogen-2 (equilibrium)

LNG

 

-234.8

1.650

16.28

60.4

0.0668

1 H hydrogen-2 (normal)

LNG

 

-234.7

1.665

16.43

60.3

0.0669

2 He helium

use

5.19

-267.96

0.227

 

 

 

CRC.a

5.19

-267.96

0.227

 

57

 

KAL

5.19

 

0.227

 

57.2

 

SMI

 

-267.9

 

2.34 kg/cm²

 

0.0693

2 He helium (equilibrium)

LNG

 

-267.96

0.2289

2.261 atm

 

0.06930

2 He helium-3

LNG

 

-269.85

0.1182

1.13 atm

72.5

0.0414

2 He helium-4

LNG

 

-267.96

0.227

2.24 atm

57.3

0.0698

3 Li lithium

use

(3223)

(2950)

(67)

 

 

 

CRC.b

(3223)

2950

(67)

 

(66)

 

7 N nitrogen

use

126.21

-146.94

3.39

 

 

 

CRC.a

126.21

-146.94

3.39

 

90

 

KAL

126.2

 

3.39

 

89.5

 

SMI

 

-147.1

 

34.7 kg/cm²

 

0.3110

7 N nitrogen-14

LNG

 

-146.94

3.39

33.5 atm

89.5

0.313

7 N nitrogen-15

LNG

 

-146.8

3.39

33.5 atm

90.4

0.332

8 O oxygen

use

154.59

-118.56

5.043

 

 

 

CRC.a

154.59

-118.56

5.043

 

73

 

LNG

 

-118.56

5.043

49.77 atm

73.4

0.436

KAL

154.6

 

5.04

 

73.4

 

SMI

 

-118.8

 

51.4 kg/cm²

 

0.430

9 F fluorine

use

144.13

-129.02

5.172

 

 

 

CRC.a

144.13

-129.02

5.172

 

66

 

LNG

 

-129.0

5.215

51.47 atm

66.2

0.574

KAL

144.3

 

5.22

 

66

 

10 Ne neon

use

44.4

-228.7

2.76

 

 

 

CRC.a

44.4

-228.7

2.76

 

42

 

LNG

 

-228.71

2.77

27.2 atm

41.7

0.4835

KAL

44.4

 

2.76

 

41.7

 

SMI

 

-228.7

 

26.8 kg/cm²

 

0.484

11 Na sodium

use

(2573)

(2300)

(35)

 

 

 

CRC.b

(2573)

2300

(35)

 

(116)

 

15 P phosphorus

use

994

721

 

 

 

 

CRC.a

994

721

 

 

 

 

LNG

 

721

 

 

 

 

16 S sulfur

use

1314

1041

20.7

 

 

 

CRC.a

1314

1041

20.7

 

 

 

LNG

 

1041

11.7

116 atm

 

 

KAL

1314

 

20.7

 

 

 

SMI

 

1040

 

 

 

 

17 Cl chlorine

use

416.9

143.8

7.991

 

 

 

CRC.a

416.9

143.8

7.991

 

123

 

LNG

 

143.8

7.71

76.1 atm

124

0.573

KAL

416.9

 

7.98

 

124

 

SMI

 

144.0

 

78.7 kg/cm²

 

0.573

18 Ar argon

use

150.87

-122.28

4.898

 

 

 

CRC.a

150.87

-122.28

4.898

 

75

 

LNG

 

-122.3

4.87

48.1 atm

74.6

0.536

KAL

150.9

 

4.90

 

74.6

 

SMI

 

-122

 

49.7 kg/cm²

 

0.531

19 K potassium

use

(2223)

(1950)

(16)

 

 

 

CRC.b

(2223)

1950

(16)

 

(209)

 

33 As arsenic

use

1673

1400

 

 

 

 

CRC.a

1673

1400

 

 

35

 

LNG

 

1400

 

 

 

 

34 Se selenium

use

1766

1493

27.2

 

 

 

CRC.a

1766

1493

27.2

 

 

 

LNG

 

1493

 

 

 

 

35 Br bromine

use

588

315

10.34

 

 

 

CRC.a

588

315

10.34

 

127

 

LNG

 

315

10.3

102 atm

135

1.184

KAL

588

 

10.3

 

127

 

SMI

 

302

 

 

 

1.18

36 Kr krypton

use

209.41

-63.74

5.50

 

 

 

CRC.a

209.41

-63.74

5.50

 

91

 

LNG

 

-63.75

5.50

54.3 atm

91.2

0.9085

KAL

209.4

 

5.50

 

91.2

 

37 Rb rubidium

use

(2093)

(1820)

(16)

 

 

 

CRC.b

(2093)

1820

(16)

 

(247)

 

LNG

 

1832

 

 

250

0.34

53 I iodine

use

819

546

11.7

 

 

 

CRC.a

819

546

 

 

155

 

LNG

 

546

11.7

115 atm

155

0.164

KAL

819

 

 

 

155

 

SMI

 

553

 

 

 

 

54 Xe xenon

use

289.77

16.62

5.841

 

 

 

CRC.c

289.77

16.62

5.841

 

118

 

LNG

 

16.583

5.84

57.64 atm

118

1.105

KAL

289.7

 

5.84

 

118

 

SMI

 

16.6

 

60.2 kg/cm²

 

1.155

55 Cs caesium

use

1938

1665

9.4

 

 

 

CRC.d

1938

1665

9.4

 

341

 

LNG

 

1806

 

 

300

0.44

80 Hg mercury

use

1750

1477

172.00

 

 

 

CRC.a

1750

1477

172.00

 

43

 

LNG

 

1477

160.8

1587 atm

 

 

KAL

1750

 

172

 

42.7

 

SMI

 

1460±20

 

1640±50 kg/cm²

 

0.5

86 Rn radon

use

377

104

6.28

 

 

 

CRC.a

377

104

6.28

 

 

 

LNG

 

104

6.28

62 atm

139

1.6

KAL

377

 

6.3

 

 

 

SMI

 

104

 

64.1 kg/cm²

 

 

References:

a) CRC.a-d

David R. Lide (ed), CRC Handbook of Chemistry and Physics, 85th Edition, online version. CRC Press. Boca Raton, Florida, 2003; Section 6, Fluid Properties; Critical Constants. Also agrees with Celsius values from Section 4: Properties of the Elements and Inorganic Compounds, Melting, Boiling, Triple, and Critical Point Temperatures of the Elements

Estimated accuracy for Tc and Pc is indicated by the number of digits. Above 750 K Tc values may be in error by 10 K or more. Vc values are not assumed accurate more than to a few percent. Parentheses indicate extrapolated values. From these sources:

  • (a) D. Ambrose, Vapor-Liquid Constants of Fluids, in R.M. Stevenson, S. Malanowski, Handbook of the Thermodynamics of Organic Compounds, Elsevier, New York, (1987).

  • (b) I.G. Dillon, P.A. Nelson, B.S. Swanson, J. Chem. Phys. 44, 4229, (1966).

  • (c) O. Sifner, J. Klomfar, J. Phys. Chem. Ref. Data 23, 63, (1994).

  • (d) N.B. Vargaftik, Int. J. Thermophys. 11, 467, (1990).

b) LNG-

J.A. Dean (ed), Lange's Handbook of Chemistry (15th Edition), McGraw-Hill, 1999; Section 6; Table 6.5 Critical Properties

c) KAL-

National Physical Laboratory, Kaye and Laby Tables of Physical and Chemical Constants; D. Ambrose, M.B. Ewing, M.L. McGlashan, Critical constants and second virial coefficients of gases (retrieved Dec 2005)

d) SMI-

W.E. Forsythe (ed.), Smithsonian Physical Tables 9th ed., online version (1954; Knovel 2003). Table 259, Critical Temperatures, Pressures, and Densities of Gases