What is mass transfer?
Which among the following is always true for mass transfer to occur?
The mass transfer by convection can take place under how many conditions?
Air at 30°C flows at 45 m/s past a wet flat plate of length 0.5 m. Estimate the value of the mass transfer coefficient, assuming the water vapor content of air is initially negligible. The thermophysical properties of air are: diffusion coefficient D = 0.256 × 10-4 m2/s, dynamic viscosity µ = 1.86 × 10-5 kg/m·s, specific heat cp = 1.005 kJ/kg·°C, Prandtl number Pr = 0.701, and density ρ = 1.165 kg/m3.
What is the unit of diffusivity?
What causes the concentration at the interphase to be unequal, according to Lewis and Whitman theory?
What will be poor if the holding time is longer in a mixer?
Find the gas phase mass transfer coefficient for unbound moisture removal if the flux is 5 kg/sq.m·s and the difference in humidity of the liquid and the main stream is 0.5 units.
In humidification, where must the gas be for mass transfer to occur?
In liquid-liquid mass transfer, what is the effect of increased viscosity on diffusivity?
What does the Schmidt number (Sc) signify in mass transfer?
According to two-film theory, what determines the overall mass transfer coefficient?
What is the physical significance of Henry’s law in mass transfer?
Which term represents the enhancement of mass transfer in turbulent flow?
Which process utilizes gas absorption as a mass transfer operation?
Which type of mass transfer involves the transfer of mass across a phase boundary?
What is the significance of the concentration gradient in mass transfer?
Which of the following is NOT a mass transfer operation?
What is molecular diffusion?
Which of these is an example of mass transfer?
What is the primary purpose of mass transfer in distillation?
Which operation uses mass transfer principles in wastewater treatment?
A sheet of Fe 1.0 mm thick is exposed to an oxidizing gas on one side and a deoxidizing gas on the other at 725°C. After reaching steady state, the Fe membrane is exposed to room temperature, and the C concentrations at each side of the membrane are 0.012 and 0.075 wt%. Calculate the diffusion coefficient (m2/sec) if the diffusion flux is 1.4×10-8kg/m2-sec.
Which one is having the lowest value of diffusivity?
The vapour pressure of the nitrogen gas is 400mmHg and the partial pressure is 300mmHg. Find the relative saturation.
Find the rate of non-diffusing solute, if the mole fraction of the gas phase is 0.65 and the diffusing rate is 70 moles/hr.
Which of the following is not an example of ideal solution?
Find the ratio of distillate to residual flow rates, if a binary mixture containing 65% of more volatile component while the distillate and the residue compositions are 90% and 30%.
What happens to the liquid after preheating when entering the cyclonic flash drum?
Which of the following reboilers is considered as an additional tray?