Basic Units and Conversion Factors

Conversion Factors

Source: Solen K.A, Harb J.N (2011): Introduction to Chemical Engineering: Tools for Today and Tomorrow, 5^th ed.,

 

Defined Units

1 dyne = 1 g*cm/s²

1 erg = 1 dyne*cm = 1 g*cm²/s²

1 J = 1 N*m = 1 kg*m²/s²

1 lbf = 32.174 lbm*ft/s²

1 N = 1 kg*m/s² = 1 Pa

1 Poise = 1 g/cm*s

1 slug = 1 lbf*s²/ft

1 W = 1 J/s

 

Prefixes

Prefix	Meaning	Abbreviation	Example
nano	10-9	n	nanometer (nm)
micro	10-6	μ	micrometer (μg)
milli	10-3	m	millimeter (mm)
centi	10-2	c	centimeter (cm)
kilo	103	k	kilometer (km)
mega	106	M	MP (megapixel)
giga	109	G	GB (gigabyte)
tera	1012	T	TB (terabyte)

 

           Periodic Table

  

Values of Universal Gas Constant, R

0.08206 atm L/gmol K

8.314 J/gmol K

8314.5 J/kgmol K

8.3145 kPa m³/kgmol K

8.3145 x 10⁷ g cm² /s² gmol K

62.37 mmHg L/gmol K

1.987 cal/gmol K

1.987 Btu/lbmol °R

0.730 atm ft³ /lbmol °R

10.73 psia ft³ /lbmol °R

1.3145 atm ft³ /lbmol °R

1545 ft lbf/lbmol °R