Dr. Lamm
Supplemental Instruction
Iowa State University / Leader: / Shawn V.
Course: / CH E 210
Instructor: / Dr. Lamm
Date: / 2-16-2016
Warm Up
Consider a gas that is flowing into a unit operation with a flow rate of 35 SCMH at a temperature of 125 degrees Celsius and 10 atm. Calculate the molar flow rate and the true volumetric flow rate of the gaseous stream.
A tank of 100 m3 butane gas at 100 degrees Celsius and 30 atm is transferred to a tank at atmospheric pressure and 40 degrees Celsius. What is the volume of the second tank?
Practice Problems
A packed bed is a unit operation commonly used to aid a process in heat transfer or separation. The “bed” is basically a tank or pipe that is filled with a solid material that interacts with the fluid that flows through the bed. Suppose 1500 kg of solid material fills a bed to a volume of 100 cubic meters. Then suppose 25 cubic meters of water is added to the bed and now the overall bed volume is 105 cubic meters. Calculate the void fraction, bulk density, and absolute density.
A stream of air flowing at a rate of 30 kg/hr is mixed with a stream of carbon dioxide. The carbon dioxide enters the mixer at a rate of 45 SCMH at 150 degrees Celsius and 1.5 bar. What is the mole percent of the carbon dioxide in the product stream?
Critical Thinking
Think of all the possible reasons why volume is not conserved like mass. Are moles always conserved?
What does it mean for a material to be incompressible?
Explain in your own words the meaning of volume additivity.