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Problem 13.3: The fugacity coefficient of CO2 in liquid n-pentane at 344.15 K, 2.93 bar approaches the value ? = 39.2. Use this information to calculate Henry's law constant for this system. Problem 13.4: A chemical process produces a waste stream that is mostly air but contains dimethlyamine (DMA) at a mol fraction of 0.01. To satisfy emission standards, the gas stream must be purified to contain no more than 100 ppm of DMA. To achieve this concentration, the gas is passed through a liquid scrubber in which water is sprayed from the top of the tank while the gas rises. During the contact between the drops and the gas, some DMA is transferred to the liquid phase. The inlet water contains no DMA and the exiting streams may be assumed to be in equilibrium with each other. The process is operated at 25 °C, 1 bar. a) Calculate the required flow rate of water to achieved the desired purification. Report the result in kg of water per kg of air. b) If the water flow rate must remain less than 50 kg water/kg of air, what is the required pressure? c) Critique the assumption that the exit streams are at equilibrium. Additional data: Henry's law constant for DMA at 25 °C is 1.84 bar.
At no load, rated voltage, and 1200 r/min, the armature current is 3 A. At full load and rated voltage, the line current is 40 A, and the flux is 5% less than its no-load value because of armature reaction. Compute the full-load speed.
The specification for a sieve plate column is given below. Make a preliminary mechanical design for the column. Your design should include:
(a) What is the minimum number of theoretical stages necessary to effect this separation? (b) What is the minimum extract reflux ratio?
Two charges of equal magnitude 5µC but opposite sign are separated by a distance of 10 m. Find the net force experienced by a positive charge q = 2 µC that is placed midway between the two charges.
For a coil current I (dc), derive an expression for the force on the plunger.
Determine the analog output voltage when the binary input code is 1100. Also, find what reference voltage is to be used in order to obtain the corresponding decimal output voltage.
1- Radioactivity is a tendency for an element or a material to ________. emit decay radiation emit light
question 1 a using appropriate data sources to be cited correctly make a reasonably accurate sketch or graph of a
A 10-minute experimental run shows that 75% of liquid reactant is converted to product by a %-order rate. What would be the fraction converted in a half-hour run?
Is this a reasonable number from a physiologic point of view when compared to the average velocity in the major and minor blood vessels in the human body?
Calculate the molarity of each of the following aqueous solutions. a. 5.0 ppb Hg in H2O b. 1.0 ppb CHCl3 in H2O c. 10.0 ppm As in H2O d. 0.10 ppm DDT (C14H9Cl5) in H2O.
Consider the solution of Example 11.4.1. By means of a phasor diagram, determine the load power factor for which the regulation is maximum (i.e., the poorest), and find the corresponding regulation.
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