Question

A humid air stream enters a process at 35 C, 20 atm, and 50% relative humidity....

A humid air stream enters a process at 35 C, 20 atm, and 50% relative humidity. The oxygen flows at 900kmol/h. Determine the molar flow rate of water in the stream.
Engineering   Chemical-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Oxygen flow rate = 900 kmol/h.

As air contains 21% oxygen by mole, tha flow rate of air = 4285.7 kmol/h

Relative humidity, RH = 50/100 = 0.50 = Partial pressure of water / vapor pressure of water at given temp

As at 35 C, tha vapor pressure of water is = 5.628 kPa

Partial pressure of water = 0.50 x 5.628 = 2.7814 kPa

Mole fraction of water in air , ywater = Partial pressure / total pressure

ywater = 2.7814/(20x101.325) = 0.00139

Molar flow rate of water in stream = mole fraction of water in air x Molar flow rate of air = 0.00139 x 4285.7 kmol/h

Molar flow rate of water in stream = 5.9511 kmol/hr.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
In a condenser, humid air at atmospheric pressure, 35 degree celsius and 90% relative humidity enters...
In a condenser, humid air at atmospheric pressure, 35 degree celsius and 90% relative humidity enters the process at a rate of 2.12 m3/s. Liquid water exits as a condensate. If the air exits at 20 degree celsius, determine the molal humidity of outlet air, absolute humidities of inlet and outlet air and flow rate of condensate in L/s.
A humid air stream flows into a condenser that also compresses the air stream. The inlet...
A humid air stream flows into a condenser that also compresses the air stream. The inlet air is a 80°C and 1 atm absolute pressure, and contains 9 mol% water. The temperature is decreased to 14.5°C and the total pressure is increased to 2.8 atm absolute, resulting in condensation and removal of some of the water as liquid. The air leaving the condenser/compressor is then heated at constant pressure to 100°C. Calculate (a) the fraction of the incoming water that...
A humid air stream flows into a condenser that also compresses the air stream. The inlet...
A humid air stream flows into a condenser that also compresses the air stream. The inlet air is a 80°C and 1 atm absolute pressure, and contains 9 mol% water. The temperature is decreased to 14.5°C and the total pressure is increased to 2.8 atm absolute, resulting in condensation and removal of some of the water as liquid. The air leaving the condenser/compressor is then heated at constant pressure to 100°C. Calculate (a) the fraction of the incoming water that...
Air at T1 = 32°C, p1 = 1 bar, 50% relative humidity enters an insulated chamber...
Air at T1 = 32°C, p1 = 1 bar, 50% relative humidity enters an insulated chamber operating at steady state with a mass flow rate of 3 kg/min and mixes with a saturated moist air stream entering at T2 = 7°C, p2 = 1 bar. A single mixed stream exits at T3 = 17°C, p3 = 1 bar. Neglect kinetic and potential energy effects A) Determine mass flow rate of the moist air entering at state 2, in kg/min. (Answer...
Moist air at 30 °C and 50% relative humidity enters a dehumidifier operating at steady state...
Moist air at 30 °C and 50% relative humidity enters a dehumidifier operating at steady state with a mass flow rate of 319.35 kg/min. The moist air passes over a cooling coil and water vapor condenses. Condensate (condensed water) exits at 10 °C. Saturated moist air exits in a separate stream at the same temperature. The pressure remains constant at 1 bar. Determine (a) the rate at which water is condensed, in kg/min, and (b) the heat transfer rate during...
Air at 95°F, 1 atm, and 10% relative humidity enters an evaporative cooler operating at steady...
Air at 95°F, 1 atm, and 10% relative humidity enters an evaporative cooler operating at steady state. The volumetric flow rate of the incoming air is 1765 ft3/min. Liquid water at 68°F enters the cooler and fully evaporates. Moist air exits the cooler at 70°F, 1 atm. There is no significant heat transfer between the device and its surroundings and kinetic and potential energy effects can be neglected. a)Determine the mass flow rate of the dry air in lb(dry air)/min....
Atmosphric air at 40 F and 50% relative humidity enters the heating section of an airconditioning...
Atmosphric air at 40 F and 50% relative humidity enters the heating section of an airconditioning device at a volumetric flow rate of 100ft^3/min. Water vapor is added to the heated air to increase the relative humidity to 55%. The temperature after the heating section is 72F and the temperature at the exit is 74F. Using the appropriate fomulas: a) determine the rate of the heat transfer in Btu/min. b) determine the mass flow of water vapor in lbm/min.
Air from outside (5 deg-C, 50% relative humidity) is heated by an electrical heater to a...
Air from outside (5 deg-C, 50% relative humidity) is heated by an electrical heater to a temperature of 35 deg-C at a mass flow rate of 10 kg/s (dry air). Determine the relative humidity of the conditioned air at the exit
If air at 65 degrees Fahrenheit and 50% humidity enters a furnace which heats the air...
If air at 65 degrees Fahrenheit and 50% humidity enters a furnace which heats the air to 120 degrees Fahrenheit. What is the relative humidity of the air leaving the furnace.
Problem #2 Air at 80°F and 80% relative humidity are cooled to 51°F at a constant...
Problem #2 Air at 80°F and 80% relative humidity are cooled to 51°F at a constant pressure of 1 atm. Use the psychrometric chart to calculate the fraction of water that condenses, and the rate at which heat must be removed to deliver 1,000 ft3 /min of humid air at the final conditions.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT