ENGINEERING CHEMISTRY

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3 ENGINEERING CHEMISTRY [Strictly according to Latest Syllabus of B.Tech. Ist Year, Jawaharlal Nehru Technological University, Kakinada] By Dr B.N. Srinivas P. Kishore Ph.D. in Catalysis & Green Chemistry Assistant Professor in Prof. and Head of the Department Department of Chemistry of Chemistry URCET, Telaprolu, Vijayawada URCET, Telaprolu, Vijayawada Andhra Pradesh Andhra Pradesh K. Subba Rao Assistant Professor in Department of Chemistry URCET, Telaprolu, Vijayawada Andhra Pradesh (An Imprint of Laxmi Publications Pvt. Ltd.) BANGALORE CHENNAI COCHIN GUWAHATI HYDERABAD JALANDHAR KOLKATA LUCKNOW MUMBAI RANCHI NEW DELHI INDIA USA GHANA KENYA

4 ENGINEERING CHEMISTRY Copyright by Laxmi Publications (P) Ltd. All rights reserved including those of translation into other languages. In accordance with the Copyright (Amendment) Act, 2012, no part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise. Any such act or scanning, uploading, and or electronic sharing of any part of this book without the permission of the publisher constitutes unlawful piracy and theft of the copyright holder s intellectual property. If you would like to use material from the book (other than for review purposes), prior written permission must be obtained from the publishers. Printed and bound in India Typeset at Goswami Associates, Delhi First Edition: 2015 UEC ENGG CHEMISTRY-SRI ISBN Price: ` Limits of Liability/Disclaimer of Warranty: The publisher and the author make no representation or warranties with respect to the accuracy or completeness of the contents of this work and specifically disclaim all warranties. The advice, strategies, and activities contained herein may not be suitable for every situation. In performing activities adult supervision must be sought. Likewise, common sense and care are essential to the conduct of any and all activities, whether described in this book or otherwise. Neither the publisher nor the author shall be liable or assumes any responsibility for any injuries or damages arising herefrom. The fact that an organization or Website if referred to in this work as a citation and/or a potential source of further information does not mean that the author or the publisher endorses the information the organization or Website may provide or recommendations it may make. Further, readers must be aware that the Internet Websites listed in this work may have changed or disappeared between when this work was written and when it is read. All trademarks, logos or any other mark such as Vibgyor, USP, Amanda, Golden Bells, Firewall Media, Mercury, Trinity, Laxmi appearing in this work are trademarks and intellectual property owned by or licensed to Laxmi Publications, its subsidiaries or affiliates. Notwithstanding this disclaimer, all other names and marks mentioned in this work are the trade names, trademarks or service marks of their respective owners. Published in India by UNIVERSITY SCIENCE PRESS (An Imprint of Laxmi Publications Pvt.Ltd.) 113, GOLDEN HOUSE, DARYAGANJ, NEW DELHI , INDIA Telephone : , Fax : , info@laxmipublications.com Branches & Bangalore & Chennai , & Cochin , & Guwahati , & Hyderabad , & Jalandhar & Kolkata & Lucknow & Mumbai , & Ranchi C Printed at:

5 CONTENT ONTENTS Preface Syllabus (ix) (xi) 1 WATER TECHNOLOGY Introduction Hardness of Water Types of Hardness Units of Expression of Hardness of Water Determination of Hardness of Water Potable Water or Drinking Water or Municipal Water Sterilisation and Disinfection Boiler Feed Water Boiler Troubles Turbine Deposits Softening of Water Desalination Osmosis Reverse Osmosis Types of Membranes Used in Desalination Process Solved Problems Exercise ELECTROCHEMISTRY Introduction Concept of Ionic Mobility Kohlrausch s Law Applications of Kohlrausch s Law Conductometric Titrations Electrode Potential Measurement of Electrode Potential (v)

6 (vi) 2.8 Single Electrode Potential Nernst Equation Electrochemical Cells or Galvanic Cells Electrochemical Series Potentiometric Titrations Concentration Cells Ion-Selective Electrode Types of Ion-Selective Electrode Batteries or Cells Solved Problems Exercise CORROSION Introduction Dry or Chemical Corrosion Wet or Electrochemical Corrosion Factors Influencing Corrosion Corrosion Control Methods (Protective Coatings) Application of Protective Coatings Methods of Application of Metal Coatings Paints Exercise HIGH POLYMERS Introduction Types of Polymerization Stereospecific Polymers Physical and Mechanical Properties of Polymers Plastics Types of Plastics Compounding of Plastics or Moulding Constituents of a Plastic Moulding of Plastics into Articles or Fabrication of Plastics Preparation, Properties and Applications Rubber and Elastomers Draw Backs of Raw Rubber Vulcanization (Discovered by Charles Goodyear in 1839) Methods for Improving Quality of Rubber Preparation, Properties and Applications Exercise FUELS Introduction Classification of Fuels

7 (vii) 5.3 Comparison between Solid, Liquid and Gaseous Fuels Coal Analysis of Coal Solved Problems Based on Analysis Calorific Value Solved Problems on Calorific Value Petroleum or Crude Oil Cracking Knocking Anti-knocking Agents Unleaded Petrol Gaseous Fuels Natural Gas Combustion Solved Problems on Combustion Exercise CHEMISTRY OF ADVANCED MATERIALS Nanomaterials Liquid Crystals Fiber Reinforced Plastics (FRP) Biodegradable Polymers Conducting Polymers Solar Cells Greenhouse Concept Green Chemistry Cement Exercise

8 PREF REFACE Engineering Chemistry has been prepared exactly as per the latest syllabus prescribed by Jawaharlal Nehru Technological University, Kakinada, Andhra Pradesh. In this book, various topics are precisely explained, giving examples and figures wherever necessary. This book is aimed at imparting the required knowledge for understanding the importance of chemistry in the field of engineering. The fundamental aspects of Osmosis, Electrochemistry, Corrosion, Polymers, Fuels were dealt with in a comprehensive way. Emphasis was given to the advanced topics like Nano-materials, Carbon nanotubes (CNTs), Fullerenes, Liquid Crystals, Fiber Reinforced Plastics (FRP), Carbon Fiber Reinforced Plastics (CFRP), Glass Fiber Reinforced Plastics, Bullet proof plastics, Biodegradable polymers, Conducting polymers, Solar cells, Solar panel, Green House Concept, Green chemistry, Cement comparative studies were also presented in the form of tables showing the differences between certain similar types of aspects. We have done our job with great care and caution. However, there may be some printing errors, we request the teachers of Engineering Chemistry, to kindly inform us to correct them. Suggestions for further improvement will be highly appreciated and thankfully acknowledge. Authors (ix)

9 ACKNO CKNOWLEDGEMENT WLEDGEMENTS It is indeed our privilege and duty to thank Sri Sunkara Rama Brahmam, Chairman, Sri Sunkara Anil Kumar and Sri Sunkara Ajay, Secretary and Correspondents of Usha Rama College of Engineering and Technology (URCET), Telaprolu (Krishna District), without their encouragement, this might not have seen the light of the day. We feel it is great pleasure in expressing our gratitude to the Principal, Dr G.V.K.S.V. Prasad, Usha Rama College of Engineering and Technology, Telaprolu (Krishna District), for his never ending inspiration and encouragement in our effort. We feel happy to acknowledge the valuable suggestions and support extended by Dr T.S.R. Prasad Rao, Retd. Director, Indian Institute of Petroleum, Dehradun, Dr K.S. Rama Rao, Dr A. Venu Gopal, Dr N. Lingaiah, Dr P. Laxmi Kantham, Director, IICT, Hyderabad. We sincerely thanks to our colleagues and friends for their valuable suggestions and moral support. We are very much obliged to our family members for their constant support, without which it would have been impossible to complete this task. We extend our sincere thanks for other references and their authors. Finally we extend our gratitude to Laxmi Publications and their staff for their efforts without which the book could not have taken this shape today. Authors (x)

10 SYLLABUS ENGINEERING CHEMISTR HEMISTRY UNIT 1: WATER TECHNOLOGY Hard Water Estimation of hardness by EDTA method Potable water Sterilization and Disinfection Boiler feed water Boiler troubles Priming and foaming, scale formation, corrosion, caustic embrittlement, turbine deposits Softening of water Lime soda, Zeolite processes Reverse osmosis Electrodialysis, Ion exchange process. Objectives: For prospective engineers knowledge about water used in industries (boilers etc.) and for drinking purposes is useful; hence chemistry of hard water, boiler troubles and modern methods of softening hard water is introduced. UNIT 2: ELECTROCHEMISTRY Concept of Ionic Mobilities Applications of Kohlrausch law Conductometric titrations Galvanic cells Electrode potentials Nernst equation Electrochemical series Potentiometric titrations Concentration cells Ion selective electrode: Batteries and Fuel cells. Objectives: Knowledge of galvanic cells, electrode potentials, concentration cells is necessary for engineers to understand corrosion problem and its control ; also this knowledge helps in understanding modern biosensors, fuel cells and improve them. UNIT 3: CORROSION Causes and effects of corrosion theories of corrosion (dry, chemical and electrochemical corrosion) Factors effecting corrosion Corrosion control methods Cathode protection Sacrificial Anodic, Impressed current methods Surface coatings Methods of application on metals (Hot dipping, Galvanizing, tinning, Cladding, Electroplating, Electroless plating) Organic surface coatings Paints Their constituents and their functions. Objectives: The problems associated with corrosion are well known and the engineers must be aware of these problems and also how to counter them. UNIT 4: HIGH POLYMERS Types of Polymerization Stereopolymers Physical and Mechanical properties of polymers Plastics Thermoplastics and thermosetting plastics Compounding and Fabrication of plastics Preparation and properties of Polyethylene, PVC and Bakelite Elastomers Rubber and Vulcanization Synthetic rubbers Styrene butadiene rubber Thiokol applications. Objectives: Plastics are materials used very widely an engineering materials. An understanding of properties particularly physical and mechanical properties of polymers/plastics/ elastomers helps in selecting suitable materials for different purpose. (xi)

11 Engineering Chemistry (JNTU) By Dr. B.N.Srinivas, P.Kishore, K. Subba Rao 40% OFF Publisher : Laxmi Publications ISBN : Author : Dr. B.N.Srinivas, P.Kishore, K. Subba Rao Type the URL : Get this ebook

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