Two large vessels containing gaseous mixture of A and B at different concentrations but at the same total pressure are connected by a tapered tube of length 15cm and end diameters 1cm and 4 cm. what should be the diameter of a cylindrical tube of the same length that allows the same rate of transport of A?

Question

Two large vessels containing gaseous mixture of A and B at different concentrations but at the same total pressure are connected by a tapered tube of length 15cm and end diameters 1cm and 4 cm. what should be the diameter of a cylindrical tube of the same length that allows the same rate of transport of A?

1 Answer

Related questions

+1 vote

1 answer

A tapered tube of length 8cm and end diameters 2cm and 4cm connects two vessels containing mixtures of A and B. if the tapered tube is replaced with a cylindrical tube of diameter 6cm, what will be the required length of the cylindrical tube to maintain the same flow rate as in the previous case?

asked Sep 20, 2022 in Mass Transfer by Julian (38.2k points)

+1 vote

1 answer

Consider steady-state equimolar counterdiffusion through the converging-diverging tube. Given: r1=1cm; r2=2cm; NA=10^-6 kmol/m^2.s at the vessel 1 end of the tube. The rate of transport of B at the vessel 2 end of the tube is

asked Sep 21, 2022 in Mass Transfer by Julian (38.2k points)

+1 vote

1 answer

In a binary gas mixture containing A and B, If NA=-2NB, what will be the expression for NA?

asked Sep 21, 2022 in Mass Transfer by Julian (38.2k points)

+1 vote

1 answer

A napthelene hemisphere is placed on a glass plate and a napthelene ball of identical diameter is kept suspended in the stagnant air in two large rooms. The respective shapes of the ball are maintained while they sublime and reduce in size. Which of the following statements are true in this connection?

asked Sep 21, 2022 in Mass Transfer by Julian (38.2k points)

+1 vote

1 answer

Equimolar counterdiffusion of A and B occurs through a spherical film of i.d=ri and thickness δ. The flux of A is NA1 at r=ri. The flux through a flat film of the same thickness is NA2. if NA1 is larger than NA2 by 5%, the film thickness δ is

asked Sep 21, 2022 in Mass Transfer by Julian (38.2k points)

+1 vote

1 answer

At which point of the following locations in the tapered tube of the previous problem is the magnitude of the flux maximum?

asked Sep 21, 2022 in Mass Transfer by Julian (38.2k points)

+1 vote

1 answer

In order to prepare Lithium nitride, air is passed gently over a reactor. Suppose that Nitrogen diffuse to a length 5cm before getting reacted with Lithium. Nitrogen reacts with lithium quickly so that partial pressure of Nitrogen at that point is 0. Reactor is a cylinder of length 10cm and diameter 2cm. Assume air to be a mixture of Nitrogen and Oxygen only. The temperature is 298K and total pressure 1atm. Diffusivity of N2 in O2 is 2*10^-5m^2/s. Calculate the Molar flux (mol/m^2.s) of N2 at a distance of 2.5cm from the top with respect to an observer moving with twice the mass average velocity a direction towards the liquid surface. (R=8.205*10^-5m^3atmK^-1mol^-1). Assume z=0 at the top of the reactor.

asked Sep 20, 2022 in Mass Transfer by Julian (38.2k points)

+1 vote

1 answer

Two horizontal steam mains with diameters 5 cm and 15 cm are to be laid in a boiler house that any mutual heat effect is precluded. The mains are at the same surface temperature of 500 degree Celsius whilst the ambient air is at 50 degree Celsius. Workout the ratios of the heat transfer coefficients

asked Sep 21, 2022 in Mass Transfer by Julian (38.2k points)

+1 vote

1 answer

Sublimation of a long cylinder made of napthelene occurs in a large volume of stagnant air. The time required for its complete sublimation is

asked Sep 21, 2022 in Mass Transfer by Julian (38.2k points)

+1 vote

1 answer

In an accident a container containing ethanol(s.g 0.789) falls down in a room of dimension 1*1*2(all in m). Ethanol forms a layer of 2mm. Ethanol vaporizes and diffuses through a stagnant film of air of thickness 2.5mm. What will be the time required for the water layer to disappear completely. The diffusivity of ethanol in air is 2.567*10^-5 m^2/s. the total pressure is 1.013 bar and the pressure of ethanol in bulk air is 0.02244 bar and at the ethanol-air interface is 0.02718bar. The temperature is 25.2°C.

asked Sep 21, 2022 in Mass Transfer by Julian (38.2k points)

+1 vote

1 answer

Oxygen diffuses through a stagnant layer of air, 1mm thick, ambient temperature 28°C and 1atm total pressure. The partial pressure of oxygen on two sides of layer is P1=0.9atm and P2=0.1atm respectively. Calculate the value of Molar flux (in mol/m^2.s) with respect to an observer moving with molar average velocity. Calculate this value at the end of the path where P2=0.1atm. Use R=8.205*10^-5m^3atmK^-1mol^-1.

asked Sep 21, 2022 in Mass Transfer by Julian (38.2k points)

+1 vote

1 answer

A binary liquid mixture is separated by distillation process. The more volatile A vaporizes while less volatile B gets transported in opposite direction. Latent heat of vaporization of A and B is 0.5unit and 1unit respectively. What will be the relation between molar flux of A and B

asked Sep 21, 2022 in Mass Transfer by Julian (38.2k points)

+1 vote

1 answer

Find the total flux for a particle A and B in a steady state if flux of A and B is 2.44 and 4.44 mol/sq.m sec.

asked Sep 21, 2022 in Mass Transfer by Julian (38.2k points)

+2 votes

1 answer

Two pulleys are connected by a belt. The sum of the diameter of two pulleys is 90 cm and while one makes 50 rpm, the other makes 20 rpm. What will be the diameters of the other pulley?

asked Jan 29, 2022 in Farm Machinery by Olivia (38.9k points)

+1 vote

1 answer

Two pulleys are connected by a belt. The sum of the diameters of the pulleys is 92.6 cm and while one makes 50 rev/min the other make 200 rev/min. What will be the diameter of the pulleys?

asked Jan 29, 2022 in Farm Machinery by Olivia (38.9k points)

+1 vote

1 answer

A spherical heater of 20 cm diameter and at 60 degree Celsius is immersed in a tank of water at 20 degree Celsius. Determine the value of convective heat transfer coefficient

asked Sep 20, 2022 in Mass Transfer by Julian (38.2k points)

+1 vote

1 answer

For two particles at steady state collision of A and B, J flux of A is 2 mol/sq.m sec find the J flux of B.

asked Sep 21, 2022 in Mass Transfer by Julian (38.2k points)

+1 vote

1 answer

For a gas mixture (A+B) equimolar counterdiffusion takes place. Which among the following statements are correct for molar flux?

asked Sep 21, 2022 in Mass Transfer by Julian (38.2k points)

+1 vote

1 answer

In the previous question if the floor has micro pores and water penetrates the floor at a constant rate of 0.1kg/m^2h, what will be the time required for the water layer to disappear?

asked Sep 21, 2022 in Mass Transfer by Julian (38.2k points)

+1 vote

1 answer

The flywheel of a hand operated chaff cutter with 4 cutting knives is rotated at 60 rpm and is connected to worm gear assembly for rotating feed rollers. The number of teeth and threads of worm gear and worm are 20 and 2 respectively. What would be the chaff length? (Diameter of feed roller is 15 cm)

asked Jan 29, 2022 in Farm Machinery by Olivia (38.9k points)

+1 vote

1 answer

Guess the saturated molar absolute humidity of the gas(A.- Vapour(B. mixture at 100 degree Celsius. Vapour pressure of A is 300 mmHg and the total pressure is 760 mmHg.

asked Sep 20, 2022 in Mass Transfer by Julian (38.2k points)

+1 vote

1 answer

A mixture undergoing multicomponent diffusion is analyzed through the Maxwell-Stefan approach. With regard to this approach which among the following statements are incorrect? The difference in the partial pressure of the Component A over a small distance ∆z (AB)is proportional to

asked Sep 20, 2022 in Mass Transfer by Julian (38.2k points)

+1 vote

1 answer

If all the components except 1 of the multicomponent diffusing mixture are inert, then what will be the expression for Diffusivity of component 1 in the mixture?

asked Sep 21, 2022 in Mass Transfer by Julian (38.2k points)

+1 vote

1 answer

What will be the values of the diffusivities (in cm^2/s) at the mean gas-film temperature?

asked Sep 21, 2022 in Mass Transfer by Julian (38.2k points)

+1 vote

1 answer

From the reaction, Methane –> Carbon + 2(Hydrogen molecule) find the ratio of N Flux of A to the Total N flux( A+B); Given N Flux of B =-2 N flux of A.

asked Sep 21, 2022 in Mass Transfer by Julian (38.2k points)

Please log in or register to answer this question.

1 Answer

Please log in or register to add a comment.

Related questions

Categories