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Study Resources (Chemistry)

Example 8.4.5 The Psychrometric Chart Use the psychrometric chart to estimate (1) the absolute humidity, wet-bulb temperature, humid volume, dew point  and specific enthalpy of humid air at 41?C and 10% relative humidity and (2) the amount of water in 150 m3 of air  at these conditions. .
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8.12. Ralph Rackstraw, your next door neighbour surprised his wife  last January by having a hot tub installed in their back  yard  while she was away  on a  business trip. It surprised  her, all right but instead  of being pleased she was horrified. "Have you lost your mind, Ralph?"  she.
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TEST YOURSELF How would you estimate ?v  for a pure hydrocarbon at its normal boiling point under each of the following conditions? 1. You know only the normal boiling point. 2. You know the normal boiling point and the critical constants. 3. You have vapor pressure data over a range that encompasses p* =1.
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Test Yourself: 1. Which of the following assumptions appears reasonable for each of the isothermal processes to be described below?(i) ?U?0, ?H?0; (ii) ?U?0, ?H≠0 (iii) neither (i) or (ii) 2. Consider the process How would you use the compressibility  charts to determine whether it is reasonable to neglect ?H for this process. .
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Example 8.5-5 Equilibrium Flash Vaporization A 30wt% NH3  solution at 100psia is fed at a rate of 100 Ibm/h to a tank in which the pressure is 1 atm. The enthalpy of the feed solution relative to the reference conditions used to construct figure 8.5-2 is 100 Ibm/h. The Vapor composition.
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8.82. Use Table B.11 to determine the specific enthalphy(kj/mol HCL) of hydrochloric acid containing 1 mol HCL/5 mol H2O at 25?C relative to: (b) H2O(1) and an infinitely dilute HCL solution at 25?C. (Note Equation 8.5.2.) 8.84. A sulfuric acid solution is labeled 8N(where 1 N=1g equivalent /L, and 1 mol of.
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Test Yourself 1.(a) Under what conditions do the temperature and humidity of a gas undergoing adiabatic cooling follow a unique curve on the psychrometric chart, regardless of the entering liquid temperature? (b) Does this curve coincide with a constant wet-bulb temperature line if the gas  is air and the liquid is water? c).
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Example 8.1-1 Energy balance on a condenser. Acetone (denoted as AC) is partially condensed out of a gas stream containing 66.9 mole % acetone vapor and the balance notrogen. Process specifications and material balance calculations lead to the flowchart shown below. The process operates at steady state. calculate the required cooling rate. .
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Example 8.5-1  Production of  Hydrochloric Acid Hydrochloric Acid is produced by absorbing gaseous  HCL (Hydrochloric Acid) in water. Calculate the heat that must be transferred to or from an absorption unit if HCL (g) at 100?C and H2O(I) at 25?C are fed to produce 1000kg/h of 20.0 wt% HCL (aq) at.
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Example 7.7-2 Siphoning. Gasoline (?=50.0 Ibm/ft3)is to be siphoned from a tank. The friction loss in the line is F= 0.80 ft. Ibt/Ibm.  Estimate how long it will take to siphon 5.00 gal, neglecting the change in liquid level in the gasoline tank during this process and assuming that both point.
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Test yourself. 1.what is the specific enthalpy of 80 wt% (aq, 110?F) relative to pure H2SO4 at 77?F and pure water at 32?F? 2. The 100wt% intercepts of the isotherms on figure 8.5-1 are difficult to read. Which isotherm must have an intercept of 0 Btu/Ibm?(Your answer should be a temperature) 3.Pure water.
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Problems: 8.2 The heat capacity at constant pressure of hydrogen cyanide is given by the expression. c)Calculate ?U (J/mol)  for the constant volume process HCN (v,25?C, 50m3/kmol)-> HCN (v,100?C, 50m3/kmol) 8.4 Use data in  Table  B.2 to calculate the following: d)  ?H (HJ/mol)  for benzene vapor going from 40 ?C to 300 ?C 8.6 Calculate  ?H.
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Example 8.4.1 Heat of Vaporization At what rate in kilowatts must heat be transferred to a liquid stream of methanol at its normal boiling point to generate 1500 g/min of saturated methanol vapor? Example 8.4.2 Vaporization and Heating One hundred moles per hour of liquid n-hexane at 25?C and 7 bar is vaporized.
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