(a)
Interpretation:
To calculate the velocity at point 2 by neglecting friction.
Concept introduction:
Following assumptions are made in the derivation of Bernoulli’s equation:
- The liquid is ideal and incompressible.
Now apply Bernoulli equation at point 1 and 2
Where
- P1 & P2 are pressure at section I and 2.
- V1 & V2 are velocity at section 1 and 2.
- z1 & z2 are the elevation from the horizontal at section 1 and 2.
- hf is the frictional losses
(b)
Interpretation:
To determine the diameter at point 1 if the pipe diameter at point 2 is 6.00 cm.
Concept introduction:
Mass balance for study flow processes:
The total amount of mass within the control volume does not change with time.
So that, the total amount of mass entering a control volume equal to the total amount of mass leaving it.
If the mass flow is
Then from conservation of mass for steady flow process will be as follows
Where
- = (? A× V)out Conservation of mass at section 1 and section 2.
If density is constant then above equation reduce to
- A is the area at respective section of the flowing processes
- V is the velocity at respective section
- ? is the density of flowing fluid in control volume
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Chapter 7 Solutions
EBK ELEMENTARY PRINCIPLES OF CHEMICAL P
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- 6. A volatilization gravimetry experiment was conducted on an unknown organic liquid (presumed to only contain carbon, hydrogen, and oxygen). The liquid was massed (data in the first column below) and then combusted in an excess of oxygen. The exhaust gas was passed through a trap containing drierite and then through a trap containing ascarite. The starting and ending masses of the drierite and ascarite were used to obtain the data in the second two columns below. Mass Unknown 12.4370 12.5590 12.2230 Mass CO2 17.0822 17.2497 16.7882 Mass H₂O 13.9849 14.1221 13.7443 A.) Calculate the mass percent of carbon, hydrogen, and oxygen in the unknown liquid. There are no outliers, so you can average the data before processing, if you wish. B.) Calculate the empirical formula of the unknown compound.arrow_forwardp/(kg m) 0.225 0.456 0.664 1.062 1.468 1.734 P1A.6 The molar mass of a newly synthesized fluorocarbon was measured in a gas microbalance. This device consists of a glass bulb forming one end of a beam, the whole surrounded by a closed container. The beam is pivoted, and the balance point is attained by raising the pressure of gas in the container, so increasing the buoyancy of the enclosed bulb. In one experiment, the balance point was reached when the fluorocarbon pressure was 327.10 Torr; for the same setting of the pivot, a balance was reached when CHF, (M= 70.014g mol) was introduced at 423.22 Torr. A repeat of the experiment with a different setting of the pivot required a pressure of 293.22 Torr of the fluorocarbon and 427.22 Torr of the CHF,. What is the molar mass of the fluorocarbon? Suggest a molecular formula. P1A.7 A constant-volume perfect gas thermometer indicates a pressure of 6.69 kPa at the triple point temperature of water (273.16 K). (a) What chang of pressure…arrow_forward150 kmol of an aqueous phosphoric acid solution contains S mol percent H3P04. The solution is concentrated by adding pure phosphoric acid at a rate of 20L per minute. Write a differential mole balance on phosphoric acid and provide an initial condition. Solve the balance to abtain an expression vdor np(t) . Use the result to derive an expression far xp(t), the mole fraction of phosphoric acid in the solution. How long will it take to concentrate the solution to IS percent H3P04 ?arrow_forward
- 3-9. A 40-cu ft tank is filled with air at 14.7 psia and 80°F. The tank also contains a 15-lb block of dry ice (solid CO2, specific gravity of 1.53 based on water). After the dry ice sublimes, the temperature is 30°F. What is the pressure? Assume ideal gas behavior.arrow_forwardA variation of the indicator-dilution method (see preceding problem) is used to measure total blood volume. A known amount of a tracer is injected into the bloodstream and disperses uniformly throughout the circulatory system. A blood sample is then withdrawn, the tracer concentration in the sample is measured, and the measured concentration [which equals (tracer injected)/(total blood volume) if no tracer is lost through blood vessel walls] is used to determine the total blood volume.In one such experiment, 0.60 cm3 of a solution containing 5.00 mg/L of a dye is injected into an artery of a grown man. About 10 minutes later, after the tracer has had time to distribute itself uniformly throughout the bloodstream, a blood sample is withdrawn and placed in the sample chamber of a spectrophotometer. A beam of light passes through the chamber, and the spectrophotometer measures the intensity of the transmitted beam and displays the value of the solution absorbance (a quantity that…arrow_forwardAn experiment on the growth rate of certain organisms requires an environment of humid air enriched in oxygen. Three input streams are fed into an evaporation chamber to produce an output stream with the following composition. (A) Liquid water, fed at a rate of 20.0 cm³/min (B) Air (21% mole % 02, the balance N2) (C) Pure oxygen, with a molar flow rate one-fifth of the molar flow rate of stream B The output gas is analyzed and is found to contain 1.5 mole % water. Calculate the molar flowrate of all unknown stream variables.arrow_forward
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