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Separation Process Engineering: Includes Mass Transfer Analysis, Fourth Edition by Phillip C. Wankat

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Appendix C. Unit Conversions and Physical Constants

Unit Conversions1

1Source: Green and Perry, Perry’s Chemical Engineers’ Handbook, 8th ed., Tables 1-4 and 1-7, 2008.

Density and Weight

1000.0 g = 1.0 kg

1.0 g/cm3 = 1000.0 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 = 0.01 g/(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 kJ/s = 1.0 kW

1.0 Btu/lbm = 2.3260 kJ/kg

1.0 Btu/(lbm ...

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