Constants and Conversion Factors - High Temperature Air Combustion: From Energy Conservation to Pollution Reduction - page 378

Appendix B

Constants and Conversion
Factors

B.1 UNIVERSAL CONSTANTS AND CONVERSION

FACTORS

Uni versal constants

-

Uni versal ideal gas constant R = 8.313 kJ/kmol·K

= 1.9872 cal/mol·K

= 1.9872 Btu/lbmol·˚R

= 1545.33 ft·lbf/lbmol·˚R

Boltzmann's constant k = 1.38054 × 10

-23

J/K

Planck' s constant h = 6.626 × 10

- 34

J·s

Speed of light in v acuum c = 2.998 × 10

8

m/s

A vogadro's number N = 6.022 × 10

23

molecules/mol

Stef an-Boltzmann constant σ = 5.6685 × 10

-8

W/m

2

K

4

calc

= 0.1714 × 10

-8

h·ft

2

˚R

σ = 5.729 × 10

-8

W/m

2

K

4

e xpr

= 0.173 × 10

-8

h·ft

2

˚R

Atmospheric pressure P = 0.101325 MP a

atm

= 1.01325 bar

= 1.01325 × 10

5

N/m

2

Ice point at 1 atm T = 0.00 ˚C

ice

= 273.15 K

Gra vitational acceleration g = 9.80665 m/s

2

= 32.17 ft/s

2

Natural log arithm log x = 0.4343 ln x

10

F araday's constant F = 9.6500 × 10

4

As/mol

Electron char ge e = 1.062 × 10

-19

As

0

Important mathematical numbers e = 2.71828

π = 3.141592

1˚ = 0.01745 rad

Conv ersion Factors

Acceleration 1 m/s

2

= 4.252 × 10

7

ft/h

2

Area 1 in

2

= 0.645 × 10

-3

m

2

1 ft

2

= 0.0929 m

2

1 yd

2

= 0.8361 m

2

1 mi

2

= 2.590 × 10

6

m

2