1. In a gas-phase diffusion mass-transfer process, the steady-state flux of species A in a binary mixture of A and B is 5.0 x 10-5 kgmole A/m²s, and the flux of B is 0 (zero). At the particular point in the diffusion space, the concentration of species A is 0.005 kgmole/m³ and the concentration of species B is 0.036 kgmole/m³. Estimate the individual net velocities of species A and B along the direction of the mass transfer, and the average molar velocity.

13.5 A 300 cfm stream of an air-SO₂ mixture containing 16.2% SO₂ by volume at 68 °F and 1.0 atm is to be scrubbed with water in a countercurrent packed tower for the purpose of recovering 95% of the SO₂. The tower operates at constant temperature. Calculate the minimum water rate in lb/hr.

Given: Methane is injected into a 5-meter pipe with an outer diameter of 20mm and a wall thickness of 1mm. Pipe is prefilled with Nitrogen. Process conditions are 27 °C and pressure 1 Atm. Molar volume: CH₂ = 28.958 dm³/mol. Molar volume: N₂ = 22.393 dm³/mol. To find: 1. Diffusion coefficient for CH₂-N₂ mixture 2. Mass diffusion rate of Methane (CH4) in Nitrogen (N₂)

Given: Thick wall natural rubber pipe with outer diameter 40mm and inner diameter 32mm is in use for transport of 100% CO₂ on a distance of 3 meters. The CO₂ concentration in the surrounding environment is 15%. Surrounding temperature is 25C. To find: 1. Mole diffusion flux of CO₂ through the pipe wall 2. Mass diffusion flux of CO₂ through the pipe wall

Given: A mixture of O₂ and CO₂ is kept in a container. The molar fraction of the O₂ is 0.4. To find: 1. Molar fraction of the CO₂ 2. Molecular weight of the mixture

Given: dry bulb temperature is 35C; wet bulb temperature is 27C To find with use of the provided psychrometric chart 1. Relative humidity 2. Absolute humidity 3. Dew point temperature 4. Specific volume 5. Enthalpy

For Re < 2000, the Sherwood number is predicted to be related to the Reynolds number and the Schmidt number by equation (3) \mathrm{Sh}=\mathrm{aRe}^{\mathrm{b}} \mathrm{Sc}^{1 / 3}

Hot oil (c, 2200 J/kg.K) is to be cooled by water (cp 4180 J/kg.K) in a 2-shell-passes and "N-tube-passes" heat exchanger. The tubes are thin-walled and are made of copper with a diameter of 1.8 cm. The length of each tubepass in the heat exchanger is "L" m, and the overall heat transfer coefficient is 340 W/m?.K. Water flows through the tubes at a total rate of 0.1 kg/s, and the oil through the shell at a rate of 0.2 kg/s. The water and the oil enter at temperatures 18 °C and 160 °C, respectively. Design a heat exchanger if it is desired to heat the water to 80 °C.

The Coronavirus pandemic has witnessed an increase in the use of disinfectants, such as household bleach. This is an aqueous alkaline solution of sodium chloride (NaCI) and sodium hypochlorite (NaCIO), and is a powerful Acidic solutions of hypochlorous acid (HCIO) are made when chlorine gas(Cl2) dissolves in water. Reaction of the chlorine with water is considered to be fast. Write down the reaction between chlorine and water.

Noting that the Reynolds number (Re) of the reactor is given by equation (2), \mathrm{Re}=\frac{\mathrm{d}_{t} \mathrm{u}}{v} in which u is the mean electrolyte velocity, use the data provided tocalculate, at 293 K, both the Reynolds number and the Schmidtnumber as a function of the volume flow rate. Comment on yourresults.