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Industrial buildings have fresh air requirements depending on the occupancy level and its function. Assume 15,000 cfm of moist air from the outdoors, which is at 32°F and a relative humidity of 80%, is heated to 70°F in order to provide a supply of fresh air to the inside of an office building.
a. What is the energy rate (Btu/min) for heating the air?
a. What is the relative humidity of the air after heating? If water vapor was added to the 70°F air to increase its relative humidity to 50%, what is the mass flow rate (Ibm/min) of water vapor required?
b. What is the daily cost of heating this building by using natural gas if the gas cost is $0.5 per therm where a therm is 100,000 Btu's?
Given stock solutions of 3 M Potassium Acetate and 500 mM EDTA, and a jar of solid Tris powder (molecular mass = 121 g/mol), how much of each component (including water) do you need to make 200 mL of a solution of 75 mM Potassium Acetate, 20 mM ED..
Depict and label a flowchart of the process, and show via DOF analysis that you can solve for all the unknowns.
Potassium chlorate decomposes into potassium chloride and oxygen. how many moles of potassium chlorate are required to form 32 grams of oxygen.
A groundwater primarily at pH 8.3 with an alkalinity of 1*102 M will have CO2 injected until the groundwater comes to equilibrium with P(CO2)=10 bar. Prior to adding the CO2 the groundwater acts as a closed system.
The Ogallala aquifer is the largest in the United States, covering 450,000 across eight states, from South Dakota to Texas. This aquifer provides 82% of the drinking water for the people who live in this region
Assuming that seawater has a total ion concentration (a.k.a colligative molarity) of 1.10 Mc, calculate how many liters of seawater are needed to produce 18.0 L of fresh water at 20 °C with an applied pressure of 68.0 bar.
Describe and explain the possible effect on your results of the following experimental errors or variations. You reaction mixture had an oily later on top when you added the 3 M sulfuric acid.
A laboratory technician needs to make 500.0mL of a 0.25 M NaOH solution. What mass of sodium hydroxide does the technician need to use?
By measuring the equilibrium between liquid and vapor phases of an acetone methanol
List the letter that corresponds to the reagent from the reagent table you need to carry out the following synthesis in 5 steps or less. Heat may not appear on the reagent table with the reagent
Oleum or fuming sulfuric acid available commercially in concentrations ranging from 20 to 99.9% sulfur trioxide.
every ten rounds an amplification of approximately 1000-fold. So, to get an amplification of 4.000 one would do 2 + 10 = 12 rounds . This, of course, assumes high yields for each step.
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