A crystallizer is to produce 500 lbs/h of copperas (FESO4 · 7 H2O, 277.85) crystals by cooling a saturated solutionwhich is fed to the crystallizer at 120°F. The slurry leaving the crystallizer is at 80°F using cooling water.Solubility Data:140 parts copperas / 100 parts water74 parts copperas / 100 parts waterCalculate the amount of wet crop and mother liquor produced.120°F:80°F:

Given, Mass of product formed, P = 500 lbs/hr The molar mass of the product formed is 277.85…

Answered: A crystallizer is to produce 500 lbs/h…

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:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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In 2000 kg of water at 20°C, 7 kg of benzoic acid are dissolved, which are to be recovered by extraction with benzene, carrying out an operation in three stages in direct current and using 150 kg of benzene for each stage. Calculate the percentage of benzoic acid extracted.
Disinfection by products refer to compounds such as___________________ that areformed during chlorine disinfection. In contrast, chlorine demand refers toconsumption of chlorine by compounds such as_________ Fill in the blanksChoices. (a) chloramines, Fe2+, (b) THMs, oxygen, (c) THMs, Fe2+, (d) chloride, organicmatter
4. [Scrubber]. A coal-fired combustion system produces flue gas that contains particulate matter. To reduce the amount of particles, the flue gas is treated in a scrubber. The measurement of the mass and size of the particles at the inlet and outlet of the scrubber yielded the size distribution data given in the following table: Particle diameter [um] (size interval: dlower → dupper) 0.10.25 0.25 → 0.5 0.5 → 1.0 1.0→2.0 2.05.0 Formulas for question 4: . Particle mass at scrubber inlet [mg] 623 55.4 12.6 8.9 7.1 5.0 10 7.7 10 →30 6.6 30→ 50 4.3 The mass of particles in each size interval was measured on a basis of 1 m²³. 31.4 33.2 123 a) What is the overall efficiency of the scrubber? [Ans: noverall 96.7 %] b) Calculate the collection efficiency (na,i) of the scrubber and the particle geometric average diameter (dpi) for each size interval. Create a graph showing the variation of na,i with dp,i. (PTO) efficiency: nd,i (%) = - 394 775 1055 c) Calculate the mass-average diameter of the…
An evaporator is fed continuously with 25 kg/hr of a solution which contains 10% NaCl, 10% NaOH and 80% H₂O. During evaporation, H₂O is removed from the solution and NaCl precipitates as crystals which is settled and removed. The concentrated liquor leaving the evaporator contains 50% NaOH, 2% NaCl and 48% H₂O. Calculate (i)Weight of salt precipitated per hour. (6) (ii) Weight of concentrated liquor leaving per hour. (6)
The analysis of pesticides for environmental extracts using chromatography typically requires a solvent exchange from dichloromethane (DCM) to a chromatograph-compatible solvent such as hexane. If DCM and hexane can be separated after the procedure, they can be recycled to reduce waste. A mixture of liquid hexane and DCM (50wt% hexane) is fed to an evaporator resulting in a vapor containing 70wt% hexane and liquid containing 10wt% hexane.a. Draw and label a flowchart for a continuous and steady-state process with a feed rate of 200.0 kg/min. Write out the general mass balance equations for total mass and hexane. Explain why you are discarding any of the terms. Solve the equations to find the mass flow rates of the vapor and liquid streams leaving the evaporator.b. Draw and label a flowchart if the process is performed in a closed container filled initially with 200.0 kg of the 50:50 mixture. Write out the integral mass balances for total mass and hexane. Explain why you are discarding…
A student uses a polystyrene calorimeter to determine the enthalpy of reaction of hydrobromic acid with potassium hydroxide. The student mixes 100.0 mL of 0.50 mol/L HBr(aq) at 21.0oC with 100.0 mL of 0.50 mol/L KOH(aq), also at 21.0oC. The highest temperature reached is 24.4oC. Write the thermochemical equation of the reaction.
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