Chemical Engineers' Portable Handbook

Appendix A

Units

meter (m)

= 100 cm

= 3.2808 ft

m 2

= 10 4cm 2

= 10.7637 ft 2

m 3

= 10 6cm 3

= 35.3147 ft 3 = 264.17 gallons

kg

= 1000gm

= 2.2046 lbm

newton (N)

= 10 5 dynes

= 0.2248 lb force

joule (J)

= Nm

= 10 7 ergs = 0.239 calories = 0.7376 ft lbf

= 9.4783 10 -4 Btu

watt

= J/s

= 0.239 cal/s = 0.7376 ft lbf/s

= 9.4783 10 -4 Btu/s = 1.341 10 -3 horsepower

pascal

= N/m 2

= 10 dyne/cm 2 = 1.4504 10 -4 lbf/m 2

= 10 -5 bar

= 9.8687 10 -6 atmosphere

pascal-second

= 10 poise

= 1000 cp = 0.672 lbm/ft s

watt/mK

= 0.5778 Btu/ft h F = 2.39 10 -3 cal/cmK

m 2/s

= 10 4cm 2/s = 10.7637 ft 2/s

R

= 1.8( K)

( ? F)

= 1.8( ? F)

F

= 1.8( C) + 32 F

K

= C + 273.16

R

= F + 460

Constants

Gas Constant* (R)

= 8.314J/a = 8.314m 3Pa/a = 83.14cm 3 bar/a

= 82.06cm 3 atm/a = 1.987 cal/a = 1.987 Btu/b

= 0.7302 ft 3 atm/b = 10.73 ft 2 (psia)/b = 1,545 ft lbf/b

where a

= gm mole K

b

= lb mole R

Acceleration of gravity

= 9.8067 m/s 2 = 32.1740 ft/s 2

Avogadro's number

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