At 25°C, 754 mmHg, and 80% relative humidity, a fuel composed of 60% ethane,20% propane, and 20% methane is burned with 30% surplus air. All H2 is convertedto H2O, and the CO2 to CO ratio is ten to one. Calculatea) the moles flue gas/moles fuelc) Flue gas Orsat analysisc) the complete analysis fluegas analysisd) m3 supplied air/kmol fuel

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Answered: At 25ºC, 754 mmHg, and 80% relative…

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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The vapour pressure of water P in mm Hg at t°C is given by the equation 1668.21 log10 PW = 7.96681 - t +228 A gaseous mixture at a total pressure of 1600 mm Hg and 100°C contains permanent gases and water vapour. The mole fraction of water vapour in the mixture is 0.12. The mixture is cooled at constant pressure. a) At what temperature will the first drops of condensed water appear? b) Using a basis of 100 kmol of initial mixture, how much water will be condensed when the temperature has reached 20°C?
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1) Immiscible Liquid-Liquid Extraction: A feed of 10,500 kg/hr consists of 12 wt% acetic acid in water. The removal of acetic acid is to be accomplished by liquid-liquid extraction in water at 25°C. The raffinate is to contain no more than 1 wt% acetic acid. K The following four solvents (and accompanying distribution coefficients are being considered. Water and each solvent can be considered immiscible. SOLVENT Methyl acetate 1.253 Isopropyl ether 0.929 Heptadecanol 0.612 For each solvent, estimate the flow rate (kg/hr) if a single equilibrium stage is used to achieve the desired separation. Chloroform 0.578 Discuss the solvent choices and indicate which may be the best option.
Example 3: A vessel content, one mole of carbon dioxide is heated. The carbon dioxide is dissociated 1 as: CO₂ → CO + 0₂. 2 If the equilibrium constant is given as: Kp = 30 ln(T) – 240. After equilibrium occurs, the carbon monoxide mole fraction is 0.098 find the reached temperature of the mixture.
Q2: The feed to a distillation column is separated into net overhead product containing nothing with a boiling point higher than isobutane and bottoms containing nothing with a boiling point below that of propane. Hint: In the overhead there is no n-C5H12 or n-C4H10, and in the bottoms there in no C2H4, C2H6, or C3H6. The composition of the feed is mole % Ethylene 2.0 Ethane 3.0 Propylene Propane Isobutane 5.0 15.0 25.0 n-Butane 35.0 n-Pentane 15.0 Total 100.0 The concentration of isobutane in the overhead is 5.0 mole percent, and the concentration of propane in the bottoms is 0.8 mole percent. 1. Draw a completely labeled flowchart for the above process 2. Do the degree of freedom analysis for the overall process
QUESTION 3 100 kg/s of solution containing 28 mass% CuSO4 is cooled slowly to 10°C to form crystals of CuSO4*5H2O. The solubility of CuSO4 at 10°C is 9.9 kg/ 100 kg water. It is estimated that 4% of the water entering the crystallizer is lost by evaporation. 3.1. Draw a diagram of the crystallizer showing all streams around it and use the yield method to calculate mass of crystals produced in the crystallizer. Additional information: Cu= 63.5 g/mol, H= 1 g/mol, S= 32 g/mol, O= 16 g/mol
A sample of sucrose, C12H22O11, is contaminated by sodium chloride. When the contaminated sample is burned in a bomb calorimeter, sodium chloride does not burn. What is the percentage of sucrose in the sample if a temperature increase of 1.50°C is observed when 3.000 g of the sample is burned in the calorimeter? Sucrose gives off 5.64×103 kJ/mol when burned. The heat capacity of the calorimeter and water is 22.51 kJ/°C. _____________ %
A gaseous fuel at 220C, 763 mmHg and saturated with water vapor is burned with excess air. Air with 60% RH is supplied at the same temperature and pressure as the fuel. The composition of the fuel shows 9.2% CO2, 0.40% C2H4, 20.9% CO, 15.6% H2, 1.9% CH4 and 52% N2. The stack gas leaves at 4000C and 9.90m H2O and contains 13.16% CO2 and 1.84% CO on a dry basis. Calculatea. Percent excess airb. Complete analysis of the stack gasc. Dew point of the stack gas Solve using a basis of 100 mols stack gas

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