...Melting Point and Boiling Point of Organic Compounds Miranda, Marilyn1, Salen, Vladimir, A.2 1Miranda, Marilyn, School of Chemical Engineering, Chemistry and Biotechnology, Mapua Institute of Technology; 2Salen, Vladimir A., CHM142L/B22, School of Chemical Engineering, Chemistry and Biotechnology, Mapua Institute of Technology [pic] ABSTRACT In this experiment, our attention will be focused on the effect of chemical structures of different organic compounds on two physical properties: their melting point and their boiling point. Melting point of compounds can be affected by intermolecular forces of attraction, geometric isomerism and purity. Boiling point of compounds can also be affected by intermolecular forces of attraction and by branching. The main purpose of this experiment is to (1)determine the effect of intermolecular forces of attraction and geometric isomerism on melting point of compounds, (2)determine the effect of purity on the melting point range of organic compounds and (3)determine the effect of intermolecular forces of attraction and branching on the boiling point of organic compounds. We can obtain wrong data as we encountered different errors while performing this experiment. As we go along to this laboratory report, we will able to know the effects of the different factors in melting point and boiling point of the compound and why the used compound arranged on that decreasing or increasing melting point or boiling point. Keywords: melting point...
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...Introduction: The melting point of a pure substance is a characteristic that is physically consistent with each specific substance. When a substance is impure, it causes the melting point to decrease and the range of the melting point to increase. In order to identify a pure substance, it must be purified in order to get an accurate melting point estimation. Purification can be done through crystallization. Crystallization is one of the simplest and most effecting ways to purify a solid. The procedure involves dissolving the impure solid, gravity filtering the hot solution through fluted filter paper to remove impurities and then cooling the filtrate to effect recovery of the material as a solid and then filtered again by suction filtration....
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...insert information later. If you finish with a large expanse of blank page, put a line through it to show that it will not be used. • All notes are to be made in indelible pen – pencil will be penalized. If you make a mistake, just draw a single line through it, not a childish scribble to hide all traces! • All data will be recorded in your lab notebook at the moment it is generated. No notes shall be written on scraps of paper or memorized for later. Other notes about the lab notebook: All pre-lab and experimental work is hand-written in your lab notebook. Make sure that your notebook has duplicate pages because you will be tearing out the perforated copy pages (usually yellow or blue) and turning them in with your lab report for grading. You will turn in all the pages used from the start of your pre-lab work through until the end of the post lab work. Each lab notebook must contain a Table of Contents that lists the...
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...CH 220C ORGANIC CHEMISTRY LABORATORY Spring, 2015 Section Page 1. General Information 2 2. Safety Information 2 3. Attendance 3 Make-Up Policy 3 4. Laboratory Protocol 3 Assigned Reading 3 Pre-Lab Quizzes 3 Lab Notebook 5 Chemicals 5 Due Dates for Reports 5 5. Orientation 5 In-Lab Information 5 Library Information 5 6. Check-In 6 7. Grading Procedure 6 8. Policy on Cheating 7 9. TA Office Hours 8 10. Faculty Course CoordinatorS 8 11. Course Web Page 8 12. Hints to Minimize Frustration IN ORGANIC CHEMISTRY 8 13. Work Schedule 10 Lab Report Due Date Schedule 10 Experiments 10 14. Supplements 17 A. Extraction of Unknown 17 B. Recrystallization of Unknown Products 18 C. Methyl Benzoate 19 D. Synthesis of Luminol 20 E. Azo Violet 23 1. GENERAL INFORMATION PRE- and CO-REQUISITES Pre- and co-requisites for CH 220C listed in the Course Schedule. Important: Because the lecture and laboratory courses are co-requisites of each other, dropping one of them requires that you drop the other as well, unless the drop occurs during ...
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...Synthesis of the Diels-Alder Adduct Purpose: To investigate the methods behind Diels-Alder chemistry through the laboratory synthesis of 4- cyclohexene-cis- ,2-dicarboxylic anhydride from butadiene sulfone with maleic anhydride. By utilizing the theoretical concepts in a hands-on approach through laboratory synthesis, I hope to gain a better understanding of the reaction concepts governing Diels- Alder chemistry. Theory: The Diels-Alder reaction is a cycloaddition, chemical reaction that occurs between a conjugated diene, a molecule with two alternating double bonds, and dienophile, an alkene, to form rings and bicyclic compounds. Because it involves the interaction of four π electrons that are supplied by the diene and the two π electrons supplied by the dienophile, the Diels-Alder reaction is often called [4 + 2] cycloaddition. In the reaction, two new σ bonds are formed and one π bond is formed at the expense of two π bonds, which results in a cyclic product. The Diels-Alder reaction is a member of a larger class of reactions called pericylic reactions, which are reactions that take place in a single step, without intermediates and that involve the flow or redistribution of bonding electrons. The reaction proceeds through a cyclic transition state and is concerted, meaning bonds in the transition state are simultaneously made or broken. The Diels-Alder reaction is favored when the dienophile is the substituted with electron withdrawing groups such as nitriles, amines...
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...Published in: Food chemistry (2005), vol. 91, pp. 469-476 Statut: Postprint (Author's version) Heating effects on some quality characteristics of date seed oil Besbes Souhail1, Blecker Christophe3, Deroanne Claude3, Lognay Georges4, Nour-Eddine Drira2, Hamadi Attia1 1 Unité Analyses Alimentaires, Département de biologie, Ecole Nationale d'Ingénieurs de Sfax, Route de Soukra B.P. W., 3038 Sfax, Tunisie. 2 Laboratoire de biotechnologie végétale, Faculté des Sciences de Sfax, Route de Soukra, 3038 Sfax, Tunisie. 3 Unité de Technologie des Industries Agro-alimentaires, Faculté Universitaire des Sciences Agronomiques de Gembloux, passage des Déportés 2, 5030 Gembloux, Belgique. 4 Unité de Chimie Générale et Organique, Faculté Universitaire des Sciences Agronomiques de Gembloux, passage des Déportés 2, 5030 Gembloux, Belgique. Abstract: Effects of heating on some quality characteristics of date seed oil from two cultivars (Deglet Nour and Allig) has been investigated using an accelerated test in a Rancimat system. Fatty acid, viscosity, absorptivity at 232 and 270 nm, colour and total melting enthalpy of Deglet Nour seed oil were less changed compared to that of Allig seed oil, because the former contained a higher amount of total phenolic compounds (526 µg/g against 215 µg/g) and a lower content of unsaturated fatty acids. Viscosity and absorptivity at 232 nm and at 270 nm increased rapidly after reaching the oxidation induction time. Differential scanning calorimetry...
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...Uses of Lithium Ceramics and glass Lithium oxide is a widely used flux for processing silica, reducing the melting point and viscosity of the material and leading to glazes of improved physical properties including low coefficients for thermal expansion.[83] Lithium oxides are a component of ovenware. Worldwide, this is the single largest use for lithium compounds.[82] Lithium carbonate (Li2CO3) is generally used in this application: upon heating it converts to the oxide.[84] Electrical and electronics In the later years of the 20th century, owing to its high electrochemical potential, lithium became an important component of the electrolyte and of one of the electrodes in batteries. Because of its low atomic mass, it has a high charge- and power-to-weight ratio. A typical lithium-ion battery can generate approximately 3 volts per cell, compared with 2.1 volts for lead-acid or 1.5 volts for zinc-carbon cells. Lithium-ion batteries, which are rechargeable and have a high energy density, should not be confused with lithium batteries, which aredisposable (primary) batteries with lithium or its compounds as the anode.[85][86] Other rechargeable batteries that use lithium include the lithium-ion polymer battery, lithium iron phosphate battery, and thenanowire battery. Lubricating greases The third most common use of lithium is in greases. Lithium hydroxide is a strong base and, when heated with a fat, produces a soap made of lithium stearate. Lithium soap has the ability to thicken oils...
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...CARIBBEAN EXAMINATIONS COUNCIL Caribbean Secondary Education Certificate CSEC® CHEMISTRY SYLLABUS Effective for examinations from May–June 2015 CXC 21/G/SYLL 13 Published by the Caribbean Examinations Council. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form, or by any means electronic, photocopying, recording or otherwise without prior permission of the author or publisher. Correspondence related to the syllabus should be addressed to: The Pro-Registrar Caribbean Examinations Council Caenwood Centre 37 Arnold Road, Kingston 5, Jamaica Telephone Number: + 1 (876) 630-5200 Facsimile Number: + 1 (876) 967-4972 E-mail Address: cxcwzo@cxc.org Website: www.cxc.org Copyright © 2013 by Caribbean Examinations Council The Garrison, St Michael BB14038, Barbados CXC 21/G/SYLL 13 Contents RATIONALE ................................................................................................................................... AIMS ............................................................................................................................................. CANDIDATE POPULATION ............................................................................................................. SUGGESTED TIME-TABLE ALLOCATION ........................................................................................ ORGANISATION OF THE SYLLABUS .................................................
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...NATIONAL QUALIFICATIONS CURRICULUM SUPPORT Chemistry A Practical Guide Support Materials [REVISED ADVANCED HIGHER] [pic] The Scottish Qualifications Authority regularly reviews the arrangements for National Qualifications. Users of all NQ support materials, whether published by Education Scotland or others, are reminded that it is their responsibility to check that the support materials correspond to the requirements of the current arrangements. Acknowledgement © Crown copyright 2012. You may re-use this information (excluding logos) free of charge in any format or medium, under the terms of the Open Government Licence. To view this licence, visit http://www.nationalarchives.gov.uk/doc/open-government-licence/ or e-mail: psi@nationalarchives.gsi.gov.uk. Where we have identified any third party copyright information you will need to obtain permission from the copyright holders concerned. Any enquiries regarding this document/publication should be sent to us at enquiries@educationscotland.gov.uk. This document is also available from our website at www.educationscotland.gov.uk. Contents Introduction 5 Chemical analysis 6 Qualitative and quantitative analysis 6 Volumetric analysis 6 Gravimetric analysis 14 Colorimetric analysis 17 Organic techniques 22 Introduction 22 Preparation 22 Isolation 24 Purification 29 Identification 33 Percentage yield 37 Errors 39 Accuracy and precision 39 Repeatability and reproducibility...
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...thermoplastic elastomers which had better tensile strength and oil resistance as compared to those formed by physical mixing only [8]. ] ] ] _ were introduced which were made by same dynamic vulcanization process but using natural and butyl rubbers in place of EPR and EPDM. Natural and butyl rubbers have the advantages like low cost, very good over molding properties, reusable and very easily recyclable scrap [9,10]. Butyl rubber based thermoplastic elastomers have excellent adhesion with other thermoplastics hence it is still used to date for many over molding applications [11]. A list of common thermoplastic elastomers used in modern world is given in Table 1. 1.2.2. Amorphous thermoplastics They are usually transparent and have diffused melting point. The molecules are arranged randomly and ] ] _ to crystalline polymers. Upon curing they shrink less as compared to crystalline thermoplastics [3,4]. Examples are polycarbonate (PC), polymethylmethacrylate (PMMA), polystyrene (PS), polyphenylene oxide (PPO), acrylonitrile butadiene styrene (ABS) [1]. 1.2.3. Semi-crystalline thermoplastics Semi-crystalline polymers plastics have combined properties of crystalline polymers and amorphous polymers. Examples are polyester Polybutylene terephtalate (PBT) and Polyamide (Nylon 6, Nylon 66). 1.3. Thermoplastic elastomers Thermoplastic elastomers are one of the most ver_ ] Thermoplastic elastomeric materials...
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...Physical Chemistry Understanding our Chemical World Physical Chemistry Understanding our Chemical World Paul Monk Manchester Metropolitan University, UK Copyright 2004 John Wiley & Sons Ltd, The Atrium, Southern Gate, Chichester, West Sussex PO19 8SQ, England Telephone (+44) 1243 779777 Email (for orders and customer service enquiries): cs-books@wiley.co.uk Visit our Home Page on www.wileyeurope.com or www.wiley.com All Rights Reserved. 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, scanning or otherwise, except under the terms of the Copyright, Designs and Patents Act 1988 or under the terms of a licence issued by the Copyright Licensing Agency Ltd, 90 Tottenham Court Road, London W1T 4LP, UK, without the permission in writing of the Publisher. Requests to the Publisher should be addressed to the Permissions Department, John Wiley & Sons Ltd, The Atrium, Southern Gate, Chichester, West Sussex PO19 8SQ, England, or emailed to permreq@wiley.co.uk, or faxed to (+44) 1243 770620. This publication is designed to provide accurate and authoritative information in regard to the subject matter covered. It is sold on the understanding that the Publisher is not engaged in rendering professional services. If professional advice or other expert assistance is required, the services of a competent professional should be sought. Other Wiley...
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...Centre, Department of Materials Cranfield University, United Kingdom the aim of this book series is to disseminate the latest developments in small scale technologies with a particular emphasis on accessible and practical content. these books will appeal to engineers from industry, academia and government sectors. for more information about the book series and new book proposals please contact the publisher, Dr. Nigel hollingworth at nhollingworth@williamandrew.com. http://www.williamandrew.com/MNt NaNotechNology applicatioNs for cleaN Water edited by Nora savage Office of Research and Development, US Environmental Protection Agency and (in alphabetical order) Mamadou Diallo Materials and process simulation center, Division of chemistry and chemical engineering, california institute of technology Jeremiah Duncan Nanoscale Science and Engineering Center, University of Wisconsin-Madison anita street Office of Research and Development, US Environmental Protection Agency and Center of Advanced Materials for the Purification of Water with Systems, University of Illinois at Urbana-Champaign richard sustich N o r w i c h , N Y, U S A copyright © 2009 by William andrew inc. No part of this book may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without permission in writing from the publisher. ISBN: 978-0-8155-1578-4 Library of Congress Cataloging-in-Publication...
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...SYLLABUS Cambridge IGCSE® Combined Science 0653 For examination in June and November 2015 Cambridge Secondary 2 Changes to syllabus for 2015 This syllabus has been updated. Significant changes to the syllabus are indicated by black vertical lines either side of the text. Cambridge International Examinations retains the copyright on all its publications. Registered Centres are permitted to copy material from this booklet for their own internal use. However, we cannot give permission to Centres to photocopy any material that is acknowledged to a third party even for internal use within a Centre. ® IGCSE is the registered trademark of Cambridge International Examinations © Cambridge International Examinations 2013 Contents 1. Introduction .................................................................................................................... 2 1.1 1.2 1.3 1.4 1.5 Why choose Cambridge? Why choose Cambridge IGCSE? Why choose Cambridge IGCSE Combined Science? Cambridge ICE (International Certificate of Education) How can I find out more? 2. Teacher support.............................................................................................................. 5 2.1 Support materials 2.2 Resource lists 2.3 Training 3. Syllabus content at a glance ........................................................................................... 6 4. Assessment at a glance ........................................................
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...Study on Power Electronic Device Battery Manufacturing At Advance Power Electric Company Limited By Shawn Das ID: 0921244 An Internship Report Presented In Partial Fulfillment Of Requirements for the Degree Bachelor of Science In Electrical and Electronic Engineering INDEPENDENT UNIVERSITY, BANGLADESH School of Engineering and Computer Science Department of Electrical and Electronic Engineering AUTUMN, 2013 Internship Study on Power Electronic Device Battery Manufacturing At Advance Power Electric Company Limited By Shawn Das ID: 0921244 has been approved ...
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...CONTENTS 1 2 3 4 5 6 Abbreviations/Definitions Code of Conduct and Ethics for Students Important Academic Rules Scheme of Studies Important Notes Detailed Syllabus 1 2 3 17 19 20 Lingaya’s University, Faridabad ABBREVIATIONS/DEFINITIONS "AC" means, Academic Council of the University. "BOM" means, the Board of Management of the University. "BOS" means, the Board of Studies of the Department. “CAU/AUC-option” CAU/AUC means change from Credit to Audit option / change from Audit to Credit option "Class/Course Committee" means, the Class/Course Committee of a class/course. "Course" means, a specific subject usually identified by its course-number and course-title, with a specified syllabus / course-description, a set of references, taught by some teacher(s) / course- instructor(s) to a specific class (group of students) during a specific academic-semester / semester. “Course Instructor" means, the teacher or the Course Instructor of a Course. "Curriculum" means the set of Course-Structure and Course-Contents. "DAA" means, the Dean of Academic Affairs. “DAAB” means Departmental Academic Appeals Board. “DEC/PEC” means Dissertation Evaluation Committee / Project Evaluation committee. “Department” means a group in the University devoted to a specific discipline also called a School. Department and School are used interchangeably. "DSA" means, Dean Student Affairs. “ESE” means End-Semester Examination “EYE” means End-Year Examination. "Faculty Advisor/Class Counsellor”...
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