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4. By adding pure sulfuric acid to an aqueous solution containing 20% sulfuric acid by mass, 60% by mass sulfuric acid solution is obtained. a. How much pure sulfuric acid should be added to obtain 1kg of 60% solution? b. If a 60% solution (1kg) is prepared at 70 °C by using 20% solution at 5°C and pure sulfuric acid at 50°C, how much heat should be removed in this case? c. What is the amount of heat to be removed or given while preparing a 60% by mass sulfuric acid solution at the boiling point?

4. By adding pure sulfuric acid to an aqueous solution containing 20% sulfuric acid by mass, 60% by mass sulfuric acid solution is obtained. a. How much pure sulfuric acid should be added to obtain 1kg of 60% solution? b. If a 60% solution (1kg) is prepared at 70 °C by using 20% solution at 5°C and pure sulfuric acid at 50°C, how much heat should be removed in this case? c. What is the amount of heat to be removed or given while preparing a 60% by mass sulfuric acid solution at the boiling point?

Introduction to Chemical Engineering Thermodynamics
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
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4. By adding pure sulfuric acid to an aqueous solution containing 20% sulfuric acid by mass, 60% by mass sulfuric acid solution is obtained. a. How much pure sulfuric acid should be added to obtain 1kg of 60% solution? b. If a 60% solution (1kg) is prepared at 70 °C by using 20% solution at 5 °C and pure sulfuric acid at 50 °C, how much heat should be removed in this case? c. What is the amount of heat to be removed or given while preparing a 60% by mass sulfuric acid solution at the boiling point? 450 100°C 400 287.8°C 350 260°C 300 232.2°C 250 Liquid + Vapor 200 150 100 50 -50 93.3°C 121.1°C -100 -150 -200 Liquid -250 -300 -350 20 40 60 80 100 Wt. percentage H,SO, 287.8°C 260°C 232.2°C Boiling point at 0.1 MPa- 176.7°C 204.4°C 176.7°C 148.9°C 121.1°C 115.6°C 110°C 148.9°C 104.4°C Boiling point at 0.1 MPa 65.6°C 37.8°C 21.1°C 0°C Enthalpy. (kJ/kg) of mixture including vapor
Transcribed Image Text:4. By adding pure sulfuric acid to an aqueous solution containing 20% sulfuric acid by mass, 60% by mass sulfuric acid solution is obtained. a. How much pure sulfuric acid should be added to obtain 1kg of 60% solution? b. If a 60% solution (1kg) is prepared at 70 °C by using 20% solution at 5 °C and pure sulfuric acid at 50 °C, how much heat should be removed in this case? c. What is the amount of heat to be removed or given while preparing a 60% by mass sulfuric acid solution at the boiling point? 450 100°C 400 287.8°C 350 260°C 300 232.2°C 250 Liquid + Vapor 200 150 100 50 -50 93.3°C 121.1°C -100 -150 -200 Liquid -250 -300 -350 20 40 60 80 100 Wt. percentage H,SO, 287.8°C 260°C 232.2°C Boiling point at 0.1 MPa- 176.7°C 204.4°C 176.7°C 148.9°C 121.1°C 115.6°C 110°C 148.9°C 104.4°C Boiling point at 0.1 MPa 65.6°C 37.8°C 21.1°C 0°C Enthalpy. (kJ/kg) of mixture including vapor
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