Chromalox Big Red Book

Technical

Reference Data Physical & Thermodynamic Properties of Common Gases Properties of Common Gases at Normal Temperatures

Specific Ht. at Constant Press 2 (Btu/lb/°F)

Thermal Conductivity (Btu/in/hr/ft 2 /°F)

Melting Point (°F) -114.34 — -103 -308.56 -229 -211 -109.3 -340.6 -150.88 -256 — -18.22 -252 -277.6 -217.7 -272.92 -369.4 -457.6 -434.45 -124.06 -168.34 -134.14 -60.34 -122.8 -296.5 -154.48 -216.4 — -415.61 -268.6 -345.75 -152.32 -361.12 -208.3 -309.82 — -104.8 32 -220

Latent Heat Fusion 2 (Btu/lb 3 )

Boiling Point (°F)

Latent Heat Vaporization (Btu/lb)

Density 1 (Lbs/Ft 3 )

Substance

Acetylene Air Ammonia Argon Butane-iso

0.068 0.0748 0.048 0.1033 0.16 0.15 0.1144 0.0725 0.1853 0.289 0.14 0.329 0.084 0.179 0.078 0.1059 0.0103 0.0056 0.2275 0.1023 0.0535 0.355 0.096 0.0446 0.142 0.131 0.096 0.056 0.0777 0.073 0.123 0.083 0.095 0.126 0.292 0.166 0.0372 0.365 —

0.3832 0.2400 0.5202 0.1233 — — 0.2025 0.2425 0.1125 0.1510 0.1440 0.4095 0.1410 0.3861 0.2750 0.3990 0.1820 1.2500 3.4090 0.0820 0.1940 — 0.0600 0.2451 0.5929 0.2400 — — — 0.2320 0.2438 0.2126 0.2175 — 0.1544 0.4820 — — —

0.129 0.18 0.154 0.113 0.0948 0.0876 0.12 0.18 0.058 — 0.0972 — 0.058 0.13 0.0610 0.1230 0.1760 0.9880 1.16 — 0.0910 — — 0.091 0.214 0.0648 — — 0.322 0.1656 0.186 0.1056 0.18 — 0.097 0.07 0.1700 — —

— — 194.4 12.1 —

-118.48 — -28.3 -302.26 13.64

—

92 589 67.9 157.3 164.7 245 90.7 145.8 — 464.4 166.5 — 72.9 10.7 192 87.7 190.6 0.3 61 237.4 248.4 184.1 — — — — 86 — 91.8 — 170.6 972 43.9 — — — — —

Butane-n Carbon Dioxide Carbon Monoxide Chlorine Chlorodifluoromethane (F-22) Chloroform Cyanogen Dichlorodifluoromethane (F-12) Ethane Ethyl Chloride

— 81.5 14.4 44.4 —

33.08 Sublimates -312.7

-30.46 -41.36 143.1 -21.62 -126.94 53.96 -154.84 -304.6 -452.092 -423.755 -91.66 -117.58 -34.06 -32.26 -79.6 -258.52 -10.714 -12.82 -108.4 -410.62 -243.4 -320.44 -129.64 -297.4 -125.32 -48.1 -90.4 14 212 -164.38 -6.106

— — — — — — — —

Ethylene Fluorine Helium Hydrogen Hydrogen Bromide Hydrogen Chloride Hydrogen Fluoride Hydrogen Iodide Hydrogen Sulfide Methane Methyl Chloride Methyl Ether Methyl Fluoride Neon Nitric Oxide

25.2 13.8 24.1 — 10.2 — 26.2 — — — 5.1 33.1

Nitrogen Nitrous Oxide Oxygen Phosphine Propane

11

— 6 — —

Silicone Tetrafluoride Sulfur Dioxide Water Vapor Xenon

— — 143.6

6.71

1. Weight in lbs/ft 3 at approximately 70°F and atmospheric pressure. 2. Where temperature is not given, 68°F (20°C) is understood. 3. All properties are at a pressure equivalent to 760 mm of mercury, unless otherwise indicated.

Properties of Common Gases at Cryogenic Temperatures

Properties / Gases

N

0

He

H

CH

NH

A

Ne

2

2

2

4

3

Density @ 32°F Atm lb/ft 3 Boiling Point @ 1 Atm - °F Melting Point @ 1 Atm - °F Vapor Density @ BP - lbs/ft 3

0.0781

0.0892

0.01114 -452 -458 (26 Atm) 0.999

0.00561

0.0448

0.0481

0.1113

0.0562

-320.4 -345.8

-297.4 -361.1

-423 -434.6

-258.7 -299.2

-28.03

-302.4 -308.7

-410.6 -415.7

-107.9

0.288

0.296

0.083 4.37

0.1124

0.0556

0.368

0.593

Liquid Density @ BP - lbs/ft 3 Vapor Pressure Solid @ MP in mm. Heat of Vapor @ BP - Btu/lb Heat of Fusion @ MP - Btu/lb Cp @ 50°F @ 1 Atm - Btu/lb°F Cp/Cv @ 59 - 68°F @ 1 Atm Critical Temperature - °F Critical Pressure @ 1 Atm

50.19 96.4 85.7 11.0

71.29 2.0 91.6 5.9

7.803

26.47 70.0

42.58 45.2

86.77

74.91

< .02 < .03

54 194.4 25.2

516

323

248.4 26.1

588.6 151.2

70.0 12.1

37.4 7.2

< 1.8

0.248 1.40

0.218 1.40

1.25 (-292°F) 1.65 (292°F)

3.39 1.41

0.528 1.31

0.523 1.31

0.125 1.67

0.25 (Approx) 1.64

-232.8 33.5

-181.1 50.1

-450.2

-399.8 12.8

-116.5 45.8

270.3 111.5

-188.5 48.0

-379.7 26.8

2.26

TECHNICAL

INFORMATION

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