• Author / Uploaded
• Juan Carlos Najarro

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CONSTANTE UNIVERSAL DE LOS GASES

(R)

1.9872 cal / mol - °K 1.9872 BTU/lb mol - °R 8314.472 J / kmol- °K 8314.472 Pa – m3 / kmol - °K 8.314472 kPa – m3 / kmol - °K 82.05746 atm – cm3 / mol - °K 82.05746 x 10-3 atm – m3 / kmol - °K 82.05746 x 10-3 atm – L / mol - °K 0.7302413 atm – pie3 / lb mol - °R 10.73159 psia – pie3 / lb mol - °R 21.85 in Hg – pie3 / lb mol - °R

TEMPERATURA

LONGITUD

T°K = T°C + 273.15

1 pie = 30.48 cm = 0.3048 m = 12 pulgadas

T°R = T°F + 459.7

1 pulgada = 2.54 cm = 0.0254 m

T°F = 1.8 T °C + 32 T°C = 5/9 . (T°F – 32)

MASA 1 lb masa = 453.59 g = 0.45359 kg

PRESIÓN 1 atm

= 760 mm Hg = 14.696 lb-f /pulg2 = 1.01325 x 105 N/m2 = 1.01325 x 105 Pa = 1.01325 x 102 kPa = 29.921 pulg Hg = 33.90 pie H2O

ENERGIA 1 BTU

= 251.98 calorías = 0.25198 kcal = 0.29307 watt – hora = 2.930 x 10- 4 kilowatt - hora = 1055.1 joules = 778.17 lbf-pie

1 caloría

= 4.1868 joules

1 Joule

= 1 N . m = 1 kg-m2/s2

VISCOSIDAD 1 centipoise

= 0.01 poise = 0.01 g/cm – s = 0.001 kg/m–s = 6.7197 x 10– 4 lb/pie-s = 2.4191 lb/pie-hr = 10-3 Pa . s = 10-3 kg/m-s

DIFUSIVIDAD 1 pie2/h = 0.258064 cm2/s = 2.58064 x 10–5 m2/s 1 cm2/s = 3.87501 pie2/h