Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN: 9781259696527
Author: J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher: McGraw-Hill Education
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Transcribed Image Text:tion requires critical thinking. (Hint: See Frerace sec
P5-15 The gaseous reaction AB has a unimolecular reaction rate constant of 0.0015 min at
80°F. This reaction is to be carried out in parallel tubes 10 ft long and I in. inside diam-
eter, under a pressure of 132 psig at 260°F. A production rate of 1000 lb/h of B is
required. Assuming an activation energy of 25,000 cal/mol, how many tubes are needed if
the conversion of A is to be 90%? Assume perfect gas laws. A and B each have molecular
weights of 58. Source: From California Professional Engineers' Exam.
P5-16 (a) The irreversible elementary reaction 2A B takes place in the gas phase in an isothermal tubular
(plug-flow) reactor. Reactant A and a diluent Care fed in equimolar ratio, and conversion of A is
80%. If the molar feed rate of A is cut in half, what is the conversion of A assuming that the feed
rate of C is left unchanged? Assume ideal behavior and that the reactor temperature remains
unchanged. What was the point of this problem? Source: From California Professional Engineers'
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- UF6 is a compound used in the process of enriching uranium. Use the attached thermodynamic data to calculate the temperature for the following phase transition shown at 1 atm. UF6(s) → UF6(g) UF6(g) UF6(s) AH,(g), kJ/mol -2148 -2197 AG, (g), kJ/mol -2029 -2008 s'(g), J/K-mol 377 228 Select an answer and submit. for keyboard navigation, use the up/down arrow keys to select an answer. a 55.9°C b. 329°C 304°C 57.0'C e 62.3°Carrow_forwardInto a combustion reactor, hexane at 55 mol and 25% excess dry air are fed. The fractional conversion of hexane is 85%. Assume that air is 21 mol% oxygen and 79 mol% nitrogen. The governing equation for the combustion reaction is: 2 C6H14 + 19 O2 → 12 CO2 + 14 H2O a. Draw a complete flowchart of the process. Clearly state any assumptions. b. Perform a degree-of-freedom analysis (atomic species DOF). c. What is the mole fraction of carbon dioxide in the flue gas on a dry basis? PLEASE Solve using ATOMIC SPECIES, thank youarrow_forwardProblem 2. With a particular catalyst and at a given temperature, the oxidation of naphthalene to phthalic anhydride proceeds as follows: R A 2 3 A = naphthalene R = naphthaquinone Sphthalic anhydride T = oxidation products k₁ = 0.21 S-¹ k₂ = 0.20 S-¹ K3 = 4.20 S-¹ k4= 0.004 s¹ ST What reactor type gives the maximum yield of phthalic anhydride? Roughly estimate this yield and the fractional conversion of naphthalene which will give this yield. (note: the word "roughly").arrow_forward
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