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## Appendix C. Unit Conversions and Physical Constants

### Unit Conversions1

Density and Weight

1000 g = 1.0 kg

1.0 g/cm3 = 1000 kg/m3

1.0 lbm = 0.45359 kg

1.0 lbm/ft3 = 16.01846 kg/m3

Transport Properties: Diffusivity, Viscosity, and Mass-Transfer Coefficient

1.0 ft2/s = 0.009290 m2/s

1.0 cm2/s = 0.0001 m2/s

1.0 Pa s = 1.0 (N s)/m2 = 1.0 kg/(m·s)

1.0 cP = 0.001 Pa·s = 0.01g/(cm·s)

1.0 lbm/(ft s) = 1.48816 Pa s

1.0 mol/[s m2(mol/L)] = 10.0 m/s

1.0 lbmol/[h ft2(lbmol/ft3)] = 0.00008467 m/s

Energy and Specific Heat

1.0 Btu = 1.055056 kJ

1.0 Btu = 0.0002931 kWh

1.0 cal = 4.184 J

1.0 kcal = 4.184 kJ

1.0 Btu/(lbm °F) = 4.1868 kJ/(kg K)

1.0 kcal/(kg °C) = 4.184 kJ/(kg K)

Length and Volume

1.0 μm (1.0 micron) = 10–6 m

100 cm = 1.0 m

1.0 feet = 0.3048 m

1000 ...

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