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Problem 1: The laboratory division of your company has sent you the following data for the system n-pentane (1) propionaldehyde (2) at 35 °C: The activity coefficients of the two components at infinite dilution are 4.0 and the saturation pressures of the pure components are 0.7 and 1 bar, respectively. a) Does this system exhibit positive, negative, or no deviations from ideal-solution behavior? b) Assuming the validity of the Margules equation, determine the constants A12 and A21 . c) You suspect that this system forms an azeotrope. What is the composition of the two phases and the pressure at the azeotrope? d) Draw a qualitative Pxy graph at 35 °C. On the graph show all the information that you have for this system. e) Your are designing a single flash separation process for a stream that contains 45% n-pentane (the rest is propionaldehyde). The mixture is to be flashed at 35 °C and you must determine the pressure so that the purity of n-pentane is 95%. What is this pressure?
The fictitious compound, pandemonium fluoride (PnF2) has a Ksp value in water of 3.091×10-9M3 at room temperature. Calculate the solubility of PnF2 in water. Express your answer in units of molarity.
Calculate the heat when 100.0 mL of 0.500 M HCl is mixed with 300.0 mL of 0.100 M Ba(OH)2. Assuming that the temperature of both solutions was initially 25.0C and that the final mixture has a mass of 400.0 g and a specific heat capacity of 4.18 J..
Carbon dioxide can be separated from other gases by preferential absorption into an amine solution. The carbon dioxide can be recovered by heating at atmospheric pressure. Suppose pure CO2 vapor is available from such a process at 80°C and 1 bar. Sup..
Calculate the bubble-point temperature, evaluate f for the first guessed value of T, and then vary T in increments of ± 5°C until the value of f changes sign from its initial value - Briefly explain why the variations in bubble-point temperature f..
The table below gives the enthalpy of benzene(1)-heptane(2) solutions at 20 °C 1 bar as a function of the mol fraction of benzene. Calculate and plot the excess enthalpy at 20 °C, 1 bar.
If you are drilling in a normally pressured zone, what pressure would you expect at 12,000 ft. (TVD) (TVD is True Vertical Depth) (round off to the nearest whole number)
For the following reactions:a. Specify which of the following equations represent oxidation-reduction reactions. b. Write the balanced half-reactions for the reactions you identified as redox in part a. c. Identify the species being oxidized and th..
A 184.6-mg sample of K2Cr2O7 is dissolved in enough water to make 500.0 mL of solution. c. A 0.1025-g sample of copper metal is dissolved in 35 mL of concentrated HNO3 to form Cu2 ions and then water is added to make a total volume of 200.0 mL. (C..
Test the knowledge and understanding of the concepts and procedures for process instrumentation and communication systems used in process industries.
A black body of finite dimension at 1000K is inserted into an infinite medium at 300 K. Given Stefan Boltzman constant as 1.8*10-5 W/m2K4, the radiative heat transfer coefficient is ------
One type of commercial smoke detector contains a minute amount of radioactive americium-241 (241Am), which decays by -particle production.
Problem Statement: Derive the equation for S* for competitive product inhibiton. Definition of variables:
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