An alkaline solution of sodium carbonate made up of 0.594% NaOH, 14.88% Na,CO3 and 84.53%water is causticized by the addition of partly slaked lime. The lime contains CaCO3, Cao and Ca(OH)2.The mass obtained from the causticization has the following analysis: 13.48% CaCO3, 0.28% Ca(OH)2,0.61% Na,CO3, 10.36% NaOH and the rest is water. The reactions are:СаО + H:0 -> Са(ОН)2NazCOз + Ca(ОH)2 NaOH + CaCО;On a basis of 100 kg of the causticized mass, calculate:a) Wt and composition of the limeb) Wt of the alkaline liquorc) % excess reactantd) degree of completion of the overall reaction

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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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Calculate the composition of the coal on a dry ash free basis which has the following composition on weight basis: S = 4%, N2 = 2%, O2 = 5%, Ash = 10%, H2O = 2%. The balance is carbon and hydrogen in the atomic ratio 10 (H/C).
Ammonia is oxidized with air to form nitric oxide in the first step of the manufacture of nitric acid. Two principal reactions occur. 4 NH3 + 50₂4 NO + 6H₂O 2 NH3 +0₂ N₂ + 3 H₂O 100 mol NH3(g)/min 25°C, 8 bars 900 mol air/min 0.21 0₂ 0.79 N₂ 150°C, 8 bars - Q (kJ/min) AĤ-904.7 kJ/mol AĤº = -633.1 kJ/mol Product gas: 700°C, 8 bars 90 mol NO/min 150 mol H₂O(g)/min 716 mol N₂/min 69 mol O₂/min Calculate the heat transferred to or from the reactor, taking atomic species as references for enthalpy calculations. (See Example 9.5-2.) AH = - 4896.1 kJ/min. 4896.1 kJ/min heat removed
Common soda-lime-silica glass is made by melting together Na2CO3, CaCO3, and SiO2. The carbonates break down, liberating CO2 gas bubbles that help to mix the molten glass. For 1,000 kg of container glass (15 wt% Na2O, 10 wt% CaO, 75 wt % SiO2), calculate the raw material batch formula. What is the weight percent of SiO2?
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Q1/ A gas at 170 atm and 149 °C consists of (80% methane, 18% ethane, 1% propane and 1% carbon dioxide). Determine the composition in mole fraction.
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.

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