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SUBSTANCE

Chemical Formula or Symbol

Speecific Heat at Constant Pressure

Density Weight in bs./cu.ft.
at 70'F and Atmospheric Pressure

Specific Gravity Relative to Air

Thermal
Conductivity
Btu.in/hr.ft2.ºF

Acetylene(ethyne)

C2H2

0.35

0.073

0.907

0.129

Air

¡¡

0.24

0.075

1

0.18

Alcohol,Methyl(Vapor)

 

0.4534

 -

 -

-

Alcohol,Methyl(Vapor)

 

0.4580

 -

-

 -

Ammonia

NH3

0.523

0.0448

0.596

0.16

Argon

Ar

0.124

0.1037

1.379

0.12

Butane

C4H10

0.395

0.1554

2.067

0.0876

Butylene

 

 -

0.148

 -

 -

Carbon Dioxide

CO2

0.199

0.115

1.529

0.12

Carbon Monoxide

CO

0.248

0.0727

0.967

0.18

Chlorine

CL2

0.115

0.1869

2.486

0.06

Chloroform

 

0.1441

 -

 -

0.046

Chloromethane

 

0.24

0.1309

 -

0.0636

Chloromethane[F12]

 

0.143

0.329

 -

0.058

Ethane

C2H6

0.386

0.0789

1.049

 

Ethyl Chloride

 

 -

0.1703

 

0.066

Ethylene

C2H4

0.4

0.0728

0.975

0.1212

Ethyl Ether

 

0.4380

 -

-

0.0924

Helium

He

1.25

0.0104

0.1381

1.1

Hydrochloric Acid(vapor)

 

0.191

0.0946

-

-

Hydrogen Chloride

HCL

0.191

0.0954

1.268

 -

Hydrogen

H2

3.43

0.0056

0.0695

0.13

Hydrogen Sulphide

H2S

0.245

0.096

1.19

0.091

Metnane

CH4

0.593

0.0447

0.554

0.21

Methyl Chloride

CH3Cl

0.24

0.1342

1.785

 -

Natural Gas

¡¡

0.56

0.0502

0.667

 -

Nitric Oxide

NO

0.231

0.078

1.037

0.1656

Nitrogen

N2

0.247

0.075

0.967

0.19

Nitrous Oxide

N2O

0.221

0.1151

1.53

0.1056

Oxygen

O2

0.217

0.0831

1.105

0.18

Propane

C3H8

0.393

0.1175

1.562

 -

Propene (propylene)

C3H6

0.358

0.1091

1.451

 -

Sulpher Dioxide

SO2

0.155

0.179

2.264

0.07

Water Vapor at 212 °F

H2O

0.482

0.037

0.489

0.16

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