Tabla De Conversiones De Unidades-1.pdf

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Facultad de Química, UNAM

Departamento de Fisicoquímica

TABLA DE CONVERSIONES DE UNIDADES LONGITUD 1 m = 10-3 km = 10 dm = 100 cm = 1000 mm 1 m = 3.2808 ft = 39.3701 in 1 cm = 10 mm = 0.1 dm = 10-2 m = 0.393701 in = 0.032808 ft 1 mm = 0.1 cm = 0.01 dm = 10-3 m 1 nm = 1000 pm = 10 Å = 10-3 μm = 10-6 mm = 10-7 cm = 10-9 m 1 μm (1 micra) = 103 nm = 104 Å = 106 pm = 10-3 mm = 10-4 cm = 10-6 m 1 Å (1 Angstrom) = 10-10 m = 10-8 cm = 10-7 mm = 10-4 μm = 0.1 nm = 100 pm 1 pm = 10-6 μm = 10-3 nm = 0.01 Å = 10-9 mm = 10-10 cm = 10-12 m 1 in = 25.4 mm = 2.54 cm = 0.0254 m 1 ft = 30.48 cm = 12 in = 0.3048 m = 3.048 x 10-4 km 1 yd = 0.91459841 m 1 mi = 1.609 km = 1609.34 m = 5280 ft NOTA: in: inch (pulgada) plg ft: feet (pies) yd: yard (yarda) mi: mille (milla)

MASA 1 kg = 1000 g = 2.2046 lb 1 g = 10-3 kg = 1000 mg = 106 μg = 109 ng 1 lb = 0.454 kg = 454 g = 16 oz 1 ton métrica = 1000 kg = 2205 lb 1 ton corta = 2000 lb 1 ton larga = 2240 lb 1 oz = 28.35 g = 0.02835 kg 1 slug = 32.1739 lb

PRESIÓN 1 Pa = 1 N/m2 1 GPa = 109 Pa = 103 MPa = 106 kPa 1 MPa = 106 Pa = 103 kPa = 10-3 GPa 1 kPa = 1000 Pa = 10 hPa = 10-3 MPa 1 hPa = 1 mbar = 100 Pa = 0.10 kPa 1 bar = 1000 mbar = 105 Pa = 100 kPa = 0.1 MPa = 10-4 GPa = 0.986923 atm = 14.5038 psia = 1.0197 kgf/cm2 = 750.062 mm Hg = 75.0062 cm Hg = 750.062 torr = 401.48 in H2O = 108 barias 1 atm = 1.01325 bar = 101.325 kPa = 0.101325 MPa = 1.01325 x 10-4 GPa = 101325 Pa = 14.7 lbf/in2 (psi) = 1.0332 kgf/cm2 = 76 cm Hg = 760 mm Hg = 406.8 in H2O = 33.9 ft H2O = 1.05 x 104 mm H2O = 1033.6 cm H2O = 1013250 dina/cm2 = 760 torr = 29.9212 in Hg 1 mm Hg = 13.6 mm H2O = 1.33 mbar = 133.322 Pa = 1 torr = 0.1 cm Hg = 0.03937 in Hg 1 lbf/in2 (psi) = 68948 dina/cm2 = 703.1 kgf/m2 = 6894.8 Pa = 0.0680 atm = 2.036 in Hg = 0.0689 bar 1 cm Hg = 13.6 cm H2O NOTA: psi: pounds per squared inch (libras fuerza sobre pulgada cuadrada) psia: pounds per squared inch absolute (libras fuerza sobre pulgada cuadrada absolutas) psig: pounds per squared inch gauge (libras fuerza sobre pulgada cuadrada manométricas) torr: torricelli

CANTIDAD DE SUSTANCIA 1 mol = 103 mmol = 106 μmol = 10-3 kmol 1 kmol (kgmol) = 1000 mol = 106 mmol = 109 μmol = 2.20463 lbmol 1 lbmol = 454 mol = 453 590 mmol Elaboró: Dr. Gerardo Omar Hernández Segura

Facultad de Química, UNAM

Departamento de Fisicoquímica

VOLUMEN 1 m3 = 1000 L = 103 dm3 = 106 cm3 = 35.3147 ft3 = 264.17 gal = 61023.7 in3 1 in3 = 16.39 cm3 1 ft3 = 28.3168 L = 0.02831 m3 = 28316.8 cm3 1 gal (UK) = 1.201 gal (US) = 4.546 L = 0.004546 m3 = 277.42 in3 1 gal (US) = 0.8326 gal (UK) = 3.785 L = 0.003785 m3 = 230.97 in3 1 L = 1 dm3 = 1000 cm3 = 1000 mL 1 cm3 = 1 mL 1 dL = 0.1 L = 10 cL = 100 cm3 = 100 mL

FUERZA 1 N = 1 kg∙m/s2 1 dina = 1 g∙cm/s2 1 lbf = 32.174 lb ft/s2 = 4.4482 N 1 kgf =1000 gf = 9.807 kg∙m/s2 = 9.807 N

ENERGÍA 1 J = 1 kg∙m2/s2 = 1 N∙m = 1 Pa∙m3 = 1 W∙s 1 erg = 1 g∙cm2/s2 = 1 dina∙cm 1 J = 0.239 cal = 107 erg = 1 N∙m = 9.48 x 10-4 Btu = 9.87 x 10-3 L∙atm = 2.778 x 10-7 kW∙h = 6.24150 x 1018 eV 1 kJ = 1000 J = 103 Pa∙m3 = 104 bar∙cm3 = 239.01 cal = 0.94845 Btu = 737.562 lb f∙ft = 1.0197 x 104 kgf∙cm = 9.86923 x 103 atm∙cm3 1 Btu = 1055.04 J = 252 cal = 778.161 lb f∙ft = 10.412 L∙atm 1 cal = 4.184 J = 3.968 x 10-3 Btu = 4.19 x 107 erg = 4.13 x 10-2 L∙atm = 3.086 lbf∙ft 1 L∙atm = 24.2 cal = 1.01 x 109 erg = 101 J = 0.096 Btu = 74.735 lbf∙ft 0.082 L∙atm = 1.987 cal = 8.314 J 1 kW∙h = 3.6 x 106 J = 8.6042 x 105 cal = 3414.36 Btu 1 eV = 1.60218 x 10-19 J NOTA: Btu: British thermal unit (unidad térmica británica)

POTENCIA 1 W = 1 J/s = 1 N m/s = 1 kg∙m2/s3 1 W = 0.23901 cal/s = 0.8064 kcal/h = 0.7376 ft lbf/s = 9.486 x 10-4 Btu/s = 3.4144 Btu/h = 1.341 x 10-3 hp 1 kW = 1000 W NOTA: hp: horse power (caballo de fuerza)

TIEMPO 1 año = 365 días = 12 meses = 48 semanas 1 día = 24 h = 1440 min = 86400 s 1 h = 60 min = 3600 s

RELACIONES DE ESCALAS TERMOMÉTRICAS

t (º C) t (º F )  32 T ( K )  273.15 T (º R)  491.69    100 180 100 180 RELACIONES DE DIFERENCIAS DE TEMPERATURAS

t (º C) t (º F ) T ( K ) T (º R)    100 180 100 180

 101325 Pa    760 mm Hg 

Ejemplo: El factor unitario para convertir de mm Hg a Pa es 

Elaboró: Dr. Gerardo Omar Hernández Segura

Facultad de Química, UNAM

Departamento de Fisicoquímica

UNIDADES COMUNES EN LAS QUE SE EXPRESA LA CONSTANTE UNIVERSAL DE LOS GASES R = 0.082 L∙atm/mol∙K = 82.06 cm3∙atm/mol∙K = 8.314 m3 Pa/mol∙K = 0.0834 L∙bar/mol∙K = 8 314 cm3∙kPa/mol∙K = 8.314 J/mol∙K = 8.314 x 107 erg/mol∙K = 83.14 cm3∙bar/mol∙K = 62 356 cm3∙torr/mol∙K = 62 356 cm3∙mm Hg/mol∙K = 62.356 L∙mm Hg/mol∙K = 1.987 cal/mol∙K = 0.7302 ft3∙atm/lbmol∙ºR = 1.987 Btu/lbmol∙ºR = 10.73 ft3∙psia/lbmol∙ºR

UNIDADES DEL SISTEMA INTERNACIONAL Magnitud: Longitud Masa Tiempo Corriente eléctrica Temperatura Cantidad de sustancia Intensidad luminosa

Nombre: metro kilogramo segundo ampere kelvin mol candela

Símbolo: m kg s A K mol cd

CONSTANTES FÍSICAS IMPORTANTES PARA LOS CURSOS DE TERMODINÁMICA Y EQUILIBRIO Y CINÉTICA Número de Avogadro Carga elemental del electrón Constante de Faraday Constante de Boltzmann Constante de Planck Masa de unidad de masa atómica (uma)

NA = 6.022 x 1023 identidades químicas/mol e = 1.60 x 10-19 C F = 96 500 C/mol kB = 1.38 x 10-23 J/K h = 6.62 x 10-34 J∙s m = 1.661 x 10-27 kg

Elaboró: Dr. Gerardo Omar Hernández Segura

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