SHORT ANSWER PROBLEMS (Points vary) 3. A mixture containing 9 mol% methane (CH4)
ID: 637837 • Letter: S
Question
SHORT ANSWER PROBLEMS (Points vary) 3. A mixture containing 9 mol% methane (CH4) in air is diluted with air. Methane has a lower the methane feed stream. (4 pts) density than air. The density of the stream exiting the mixer will bee A. Lower than B. Higher than C. The same as D. Not sure Air (91 mol%)- Air /4 4. General Procedure for Single-Unit Process Material Balance Calculations. Organize the steps in order from step I to step 9. (5 pts) 1 Choose a basis of calculation. Draw a flow chart and fill in all known variables. Solve the equations. Do the degree of freedom analysis. Express what the problem statement asks you to determine in terms of the labeled variables. Write out necessary equations and circle variables you will solve for Convert all units to the same basis (if necessary). Calculate the quantities requested in the problem statement. Ifyouchoseadifferentbasis than was stated in the problem statement, scale your answer to obtain correct final results. 15Explanation / Answer
Ans 3
density of stream exiting = mol fraction of CH4 x density of CH4 + mol fraction of air x density of air
mol fraction of CH4 < mol fraction of air
Density of CH4 < Density of air
(mol fraction of CH4 x density of CH4) < (mol fraction of air x density of air)
density of stream exiting is almost equal to (mol fraction of air x density of air)
density of stream exiting the mixer will be higher the density of the methane feed stream.
Option B is the correct answer
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