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Problema 1. Calcular en cuanto decrece la velocidad de la lámina superior de un fluido en la dirección positiva del eje x, cuando la densidad de flujo de cantidad de movimiento es de 3 105 kg m^2 f ^ − , cuando la distancia entre láminas es de 0.01 cm. y la inferior se mueve a la velocidad de 0.5 m/seg. La viscosidad del fluido es 0.4 cp. Problema 2. Use fig. 1.3-1 to find the viscosity in Pa.s of methyl fluoride at 370 °C and 120 atm. Use the following values for the critical constants: Tc = 4.55 °C, Pc = 58.0 atm, ρc = 0. g/cm^3. Problema 3. The following data are available for the viscosities of mixtures of hydrogen and Freon-12 (dichlorodifluoromethane) at 25 °C and 1 atm. Mole fraction of H 2 : 0.00 0.25 0.50 0.75 1. μ x 10^6 (poise): 124.0 128.1 131.9 135.1 88. Use the viscosities of the pure component to calculate the viscosities at the three intermediate compositions by means of Eqs. 1.4-15 and 16. Problem 4. Predict the viscosities (in cp) of chlorine-air mixtures at 75 °F and 1 atm, for the following mole fractions of chlorine: 0.00, 0.25, 0.50, 0.75, 1.00. Consider air as a single component and use eqs. 1.4-14 to 16. Problema 5. En la siguiente tabla se dan las viscosidades experimentales de gases no polares a presión atmosférica y a la temperatura que se indica. Calcular, para cada caso, la viscosidad y el error que se comete. Gas no polar T (ºC) (^) Experimental (cP) Benceno 150 0. CCl 4 125 0. Etano 50 0. Hexano 135 0. SO 2 40 0. Problema 6. Las viscosidades experimentales de algunos líquidos a diversas temperaturas se dan en la tabla siguiente: Líquido T ( °C )^ Experimental (cP) Acetona 30 0. Benceno 40 0. CCl 4 30 0. Etanol 40 0. Freon 12 (^) − 10 1.