Contents of the Section: History of Thermal Analysis and ICTAC and CALCON Societies
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Chemistry Grade Level 10 Units 1-15
COPPELL ISD SUBJECT YEAR AT A GLANCE GRADE HEMISTRY UNITS C LEVEL 1-15 10 Program Transfer Goals ● Ask questions, recognize and define problems, and propose solutions. ● Safely and ethically collect, analyze, and evaluate appropriate data. ● Utilize, create, and analyze models to understand the world. ● Make valid claims and informed decisions based on scientific evidence. ● Effectively communicate scientific reasoning to a target audience. PACING 1st 9 Weeks 2nd 9 Weeks 3rd 9 Weeks 4th 9 Weeks Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit Unit Unit Unit Unit Unit Unit Unit Unit 7 8 9 10 11 12 13 14 15 1.5 wks 2 wks 1.5 wks 2 wks 3 wks 5.5 wks 1.5 2 2.5 2 wks 2 2 2 wks 1.5 1.5 wks wks wks wks wks wks wks Assurances for a Guaranteed and Viable Curriculum Adherence to this scope and sequence affords every member of the learning community clarity on the knowledge and skills on which each learner should demonstrate proficiency. In order to deliver a guaranteed and viable curriculum, our team commits to and ensures the following understandings: Shared Accountability: Responding -
Calorimetry the Science of Measuring Heat Generated Or Consumed During a Chemical Reaction Or Phase Change
February 05, 2014 Calorimetry the science of measuring heat generated or consumed during a chemical reaction or phase change What is going to happen when the burner is lit? February 05, 2014 Experimental Design Chemical changes involve potential energy, which cannot be measured directly Chemical reactions absorb or release energy with the surroundings, which cause a change in temperature of the surroundings (and this can be measured) In a calorimetry experiment, we set up the experiment so all of the energy from the reaction (the system) is exchanged with the surroundings ∆Esystem = ∆Esurroundings Chemical System Surroundings (water) Endothermic Change February 05, 2014 Chemical System Surroundings (water) Exothermic Change ∆Esystem = ∆Esurroundings February 05, 2014 There are three main calorimeter designs: 1) Flame calorimeter -a fuel is burned below a metal container filled with water 2) Bomb Calorimeter -a reaction takes place inside an enclosed vessel with a surrounding sleeve filled with water 3) Simple Calorimeter -a reaction takes place in a polystyrene cup filled with water Example #1 A student assembles a flame calorimeter by putting 350 grams of water into a 15.0 g aluminum can. A burner containing ethanol is lit, and as the ethanol is burning the temperature of the water increases by 6.30 ˚C and the mass of the ethanol burner decreases by 0.35 grams. Use this information to calculate the molar enthalpy of combustion of ethanol. February 05, 2014 The following apparatus can be used to determine the molar enthalpy of combustion of butan-2-ol. Initial mass of the burner: 223.50 g Final mass of the burner : 221.25 g water Mass of copper can + water: 230.45 g Mass of copper can : 45.60 g Final temperature of water: 67.0˚C Intial temperature of water : 41.3˚C Determine the molar enthalpy of combustion of butan-2-ol. -
Thermal Analysis
TECHNIQUE NOTE Thermal Analysis The scientists at EAG are experts in using thermal analysis techniques for materials characterization as well as for designing custom studies. This application note details TGA (Thermogravimetric Analysis), TG-EGA (Thermogravimetric Analysis with Evolved Gas Analysis), DSC (Differential Scanning Calorimetry), TMA (Thermomechanical Analysis) and DMA (Dynamic Mechanical Analysis). These techniques have played key roles in detailed materials identifications, failure analysis and deformulation (reverse engineering) investigations. THERMOGRAVIMETRIC ANALYSIS (TGA) DESCRIPTION • Vaporization, sublimation TGA measures changes in sample weight in a controlled thermal • Deformulation/failure analysis environment as a function of temperature or time. The changes in • Loss on drying sample weight (mass) can be a result of alterations in chemical or • Residue/filler content physical properties. • Decomposition kinetics TGA is useful for investigating the thermal stability of solids and liquids. A sensitive microbalance measures the change in mass of STRENGTHS the sample as it is heated or held isothermally in a furnace. The • Small sample size purge gas surrounding the sample can be either chemically inert • Analysis of solids and liquids with minimal sample preparation or reactive. TGA instruments can be programmed to switch gases during the test to provide a wide range of information in a single • Quantitative analysis of multiple mass loss thermal events experiment. from physical and chemical changes of materials • Separation and analysis of multiple overlapping mass loss COMMON APPLICATIONS events • Thermal stability/degradation studies LIMITATION • Investigating mass losses resulting from physical and chemical changes • Evolved products are identified only when the TGA is connected to an evolved gas analyzer (e.g. TGA/MS or TGA/ • Quantitation of volatiles/moisture FTIR) • Screening additives COPYRIGHT © 2017 EAG, INC. -
"Thermal Analysis and Calorimetry," In
Article No : b06_001 Thermal Analysis and Calorimetry STEPHEN B. WARRINGTON, Formerly Anasys, IPTME, Loughborough University, Loughborough, United Kingdom Gu€NTHER W. H. Ho€HNE, Formerly Polymer Technology (SKT), Eindhoven University of Technology, Eindhoven, The Netherlands 1. Thermal Analysis.................. 415 2.2. Methods of Calorimetry............. 424 1.1. General Introduction ............... 415 2.2.1. Compensation of the Thermal Effects.... 425 1.1.1. Definitions . ...................... 415 2.2.2. Measurement of a Temperature Difference 425 1.1.2. Sources of Information . ............. 416 2.2.3. Temperature Modulation ............. 426 1.2. Thermogravimetry................. 416 2.3. Calorimeters ..................... 427 1.2.1. Introduction ...................... 416 2.3.1. Static Calorimeters ................. 427 1.2.2. Instrumentation . .................. 416 2.3.1.1. Isothermal Calorimeters . ............. 427 1.2.3. Factors Affecting a TG Curve ......... 417 2.3.1.2. Isoperibolic Calorimeters ............. 428 1.2.4. Applications ...................... 417 2.3.1.3. Adiabatic Calorimeters . ............. 430 1.3. Differential Thermal Analysis and 2.3.2. Scanning Calorimeters . ............. 430 Differential Scanning Calorimetry..... 418 2.3.2.1. Differential-Temperature Scanning 1.3.1. Introduction ...................... 418 Calorimeters ...................... 431 2.3.2.2. Power-Compensated Scanning Calorimeters 432 1.3.2. Instrumentation . .................. 419 2.3.2.3. Temperature-Modulated 1.3.3. Applications ...................... 419 Scanning Calorimeters . ............. 432 1.3.4. Modulated-Temperature DSC (MT-DSC) . 421 2.3.3. Chip-Calorimeters .................. 433 1.4. Simultaneous Techniques............ 421 2.4. Applications of Calorimetry.......... 433 1.4.1. Introduction ...................... 421 2.4.1. Determination of Thermodynamic Functions 433 1.4.2. Applications ...................... 421 2.4.2. Determination of Heats of Mixing . .... 434 1.5. Evolved Gas Analysis.............. -
THERMOCHEMISTRY – 2 CALORIMETRY and HEATS of REACTION Dr
THERMOCHEMISTRY – 2 CALORIMETRY AND HEATS OF REACTION Dr. Sapna Gupta HEAT CAPACITY • Heat capacity is the amount of heat needed to raise the temperature of the sample of substance by one degree Celsius or Kelvin. q = CDt • Molar heat capacity: heat capacity of one mole of substance. • Specific Heat Capacity: Quantity of heat needed to raise the temperature of one gram of substance by one degree Celsius (or one Kelvin) at constant pressure. q = m s Dt (final-initial) • Measured using a calorimeter – it absorbed heat evolved or absorbed. Dr. Sapna Gupta/Thermochemistry-2-Calorimetry 2 EXAMPLES OF SP. HEAT CAPACITY The higher the number the higher the energy required to raise the temp. Dr. Sapna Gupta/Thermochemistry-2-Calorimetry 3 CALORIMETRY: EXAMPLE - 1 Example: A piece of zinc weighing 35.8 g was heated from 20.00°C to 28.00°C. How much heat was required? The specific heat of zinc is 0.388 J/(g°C). Solution m = 35.8 g s = 0.388 J/(g°C) Dt = 28.00°C – 20.00°C = 8.00°C q = m s Dt 0.388 J q 35.8 g 8.00C = 111J gC Dr. Sapna Gupta/Thermochemistry-2-Calorimetry 4 CALORIMETRY: EXAMPLE - 2 Example: Nitromethane, CH3NO2, an organic solvent burns in oxygen according to the following reaction: 3 3 1 CH3NO2(g) + /4O2(g) CO2(g) + /2H2O(l) + /2N2(g) You place 1.724 g of nitromethane in a calorimeter with oxygen and ignite it. The temperature of the calorimeter increases from 22.23°C to 28.81°C. -
Isothermal Titration Calorimetry and Differential Scanning Calorimetry As Complementary Tools to Investigate the Energetics of Biomolecular Recognition
JOURNAL OF MOLECULAR RECOGNITION J. Mol. Recognit. 1999;12:3–18 Review Isothermal titration calorimetry and differential scanning calorimetry as complementary tools to investigate the energetics of biomolecular recognition Ilian Jelesarov* and Hans Rudolf Bosshard Department of Biochemistry, University of Zurich, CH-8057 Zurich, Switzerland The principles of isothermal titration calorimetry (ITC) and differential scanning calorimetry (DSC) are reviewed together with the basic thermodynamic formalism on which the two techniques are based. Although ITC is particularly suitable to follow the energetics of an association reaction between biomolecules, the combination of ITC and DSC provides a more comprehensive description of the thermodynamics of an associating system. The reason is that the parameters DG, DH, DS, and DCp obtained from ITC are global properties of the system under study. They may be composed to varying degrees of contributions from the binding reaction proper, from conformational changes of the component molecules during association, and from changes in molecule/solvent interactions and in the state of protonation. Copyright # 1999 John Wiley & Sons, Ltd. Keywords: isothermal titration calorimetry; differential scanning calorimetry Received 1 June 1998; accepted 15 June 1998 Introduction ways to rationalize structure in terms of energetics, a task that still is enormously difficult inspite of some very Specific binding is fundamental to the molecular organiza- promising theoretical developments and of the steady tion of living matter. Virtually all biological phenomena accumulation of experimental results. Theoretical concepts depend in one way or another on molecular recognition, have developed in the tradition of physical-organic which either is intermolecular as in ligand binding to a chemistry. -
Conceptual Approach to Thermal Analysis and Its Main Applications
Prospect. Vol. 15, No. 2, Julio-Diciembre de 2017, 117-125 Conceptual approach to thermal analysis and its main applications Aproximación conceptual al análisis térmico y sus principales aplicaciones Alejandra María Zambrano Arévalo1*, Grey Cecilia Castellar Ortega2, William Andrés Vallejo Lozada3, Ismael Enrique Piñeres Ariza4, María Mercedes Cely Bautista5, Jesús Sigifredo Valencia Ríos6 1*M.Sc. Chemical Sciences, Full Professor, Universidad de la Costa. Barranquilla-Colombia. 2M.Sc. Chemical Sciences, Full Professor, Universidad Autónoma del Caribe. Barranquilla-Colombia. 3Ph.D. Chemical Sciences, Full Professor, Universidad del Atlántico. Barranquilla-Colombia. 4M.Sc. Physical Sciences, Occasional Full Professor, Universidad del Atlántico. Barranquilla-Colombia. 5Ph.D. Engineering, Full Professsor, Universidad Autónoma del Caribe. Barranquilla-Colombia. 6Ph. D. Universidad Nacional de Colombia, Vicerrector Universidad Nacional de Colombia (Sede Palmira). Palmira-Colombia. E-mail: [email protected] Recibido 12/04/2017 Cite this article as: A. Zambrano, G.Castellar, W.Vallejo, I.Piñeres, M.M. Aceptado 28/05/2017 Cely, J.Valencia, Aproximación conceptual al análisis térmico y sus principales aplicaciones, “Conceptual approach to thermal analysis and its main applications”. Prospectiva, Vol 15, N° 2, 117-125, 2017. ABSTRACT This work shows to the reader a general description about the techniques of classic thermal analysis as known as Differential Scanning Calorimetry (DSC), Differential Thermal Analysis (DTA) and Thermal Gravimetric Analysis. These techniques are very used in science and material technologies (metals, metals alloys, ceramics, glass, polymer, plastic and composites) with the purpose of characterizing precursors, following and control of process, adjustment of operation conditions, thermal treatment and verifying of quality parameters. Key words: Physical chemistry; Calorimetry; Thermochemistry; Thermal analysis. -
Calorimetry Has Been Routinely Used at US and European Facilities For
10. PRINCIPLES AND APPLICATIONS OF CALORIMETRIC ASSAY D. S. Bracken, and C. R. Rudy I. Introduction Calorimetry is the quantitative measurement of heat. Applications of calorimetry include measurements of the specific heats of elements and compounds, phase-change enthalpies, and the rate of heat generation from radionuclides. The most successful radiometric calorimeter designs fit the general category of heat-flow calorimeters. Calorimetry is used as a nondestructive assay (NDA) technique for determining the power output of heat-producing nuclear materials. The heat is generated by the decay of radioactive isotopes within the item. Because the heat-measurement result is completely independent of material and matrix type, it can be used on any material form or item matrix. Heat-flow calorimeters have been used to measure thermal powers from 0.5 mW (0.2 g low-burnup plutonium equivalent) to 1,000 W for items ranging in size from less than 2.54 cm to 60 cm in diameter and up to 100 cm in length. Calorimetric assay is the determination of the mass of radioactive material through the combined measurement of its thermal power by calorimetry and its isotopic composition by gamma-ray spectroscopy or mass spectroscopy. Calorimetric assay has been routinely used at U.S. and European facilities for plutonium process measurements and nuclear material accountability for the last 40 years [EI54, GU64, GU70, ANN15.22, AS1458, MA82, IAEA87]. Calorimetric assay is routinely used as a reliable NDA technique for the quantification of plutonium and tritium content. Calorimetric assay of tritium and plutonium-bearing items routinely obtains the highest precision and accuracy of all NDA techniques. -
Beam Sterilization with Gamma Radiation Sterilization
FABAD J. Pharm. Sci., 34, 43–53, 2009 REVIEW ARTICLE Sterilization Methods and the Comparison of E-Beam Sterilization with Gamma Radiation Sterilization Mine SİLİNDİR*, A. Yekta ÖZER*° Sterilization Methods and the Comparison of E-Beam Sterilizasyon Metodları ve E-Demeti ile Sterilizasyonun Sterilization with Gamma Radiation Sterilization Gama Radyasyonu ile Karşılaştırılması Summary Özet Sterilization is used in a varity of industry field and a strictly Sterilizasyon endüstrinin pek çok alanında kullanılmakta- required process for some products used in sterile regions dır ve medikal cihazlar ve parenteral ilaçlar gibi direk vü- of the body like some medical devices and parenteral drugs. cudun steril bölgelerine uygulanan bazı ürünler için ge- Although there are many kinds of sterilization methods rekli bir işlemdir. Ürünlerin fizikokimyasal özelliklerine according to physicochemical properties of the substances, bağlı olarak pek çok farklı sterilizasyon metodu bulunma- the use of radiation in sterilization has many advantages sına rağmen, radyasyonun sterilizasyon amacıyla kullanı- depending on its substantially less toxicity. The use of mı daha az toksik etkisine bağlı olarak pek çok avantaja sa- radiation in industrial field showed 10-15% increase per every hiptir. Radyasyonun endüstriyel alanda kullanımı her yıl year of the previous years and by 1994 more than 180 gamma bir öncekine oranla %10-15 artış göstermiştir ve 1994’ten irradiation institutions have functioned in 50 countries. As bu yana 50 ülkede 180’den fazla gama ışınlama -
Calorimetry - 2018
Physikalisch-chemisches Praktikum I Calorimetry - 2018 Calorimetry Summary Calorimetry can be used to determine the heat flow in chemical reactions, to mea- sure heats of solvation, characterize phase transitions and ligand binding to pro- teins. Theoretical predictions of bond energies or of the stability and structure of compounds can be tested. In this experiment you will become familiar with the basic principles of calorimetry. You will use a bomb calorimeter, in which chemical reactions take place without change of volume (isochoric reaction path). The tem- perature change in a surrounding bath is monitored. You will compute standard enthalpies of formation and perform a thorough error analysis. Contents 1 Introduction2 1.1 Measuring heat.................................2 1.2 Calorimetry Today...............................2 2 Theory3 2.1 Heat transfer in different thermodynamic processes.............3 2.2 Temperature dependence and heat capacity.................5 2.3 Different Reaction paths and the law of Hess.................6 3 Experiment8 3.1 Safety Precautions...............................8 3.2 Experimental procedure............................8 3.3 Thermometer Calibration........................... 11 4 Data analysis 11 4.1 Determination of the temperature change ∆T ................ 11 4.2 Calibration of the calorimeter......................... 11 4.3 Total heat of combustion at standard temperature.............. 13 4.4 Correction for the ignition wire........................ 13 4.5 Nitric acid correction.............................. 13 4.6 Standard heat of combustion of the sample.................. 14 4.7 Reaction Enthalpy and Enthalpy of Formation................ 14 5 To do List and Reporting 14 A Error analysis for the heat capacity of the calorimeter 16 B Error analysis for ∆qTs of the sample 17 C Fundamental constants and useful data[1] 18 Page 1 of 19 Physikalisch-chemisches Praktikum I Calorimetry - 2018 1 Introduction 1.1 Measuring heat Heat can not be measured directly. -
Thermal Analysis Methods
Modern Methods in Heterogeneous Catalysis Research Thermal analysis methods Rolf Jentoft 03.11.06 Outline • Definition and overview • Thermal Gravimetric analysis • Evolved gas analysis (calibration) • Differential Thermal Analysis/DSC • Kinetics introduction • Data analysis examples Definition Thermal analysis: the measurement of some physical parameter of a system as a function of temperature. Usually measured as a dynamic function of temperature. Types of thermal analysis – TG (Thermogravimetric) analysis: weight – DTA (Differential Thermal Analysis): temperature – DSC (Differential Scanning Calorimetry): temperature – DIL (Dilatometry): length – TMA (Thermo Mechanical Analysis): length (with strain) – DMA (Dynamic-Mechanical Analysis): length (dynamic) – DEA (Dielectric Analysis): conductivity – Thermo Microscopy: image –...– Combined methods Thermogravimetric Developed by Honda in 1915 Oven Oven heated at controlled rate Sample Temperature and Weight are recorded Balance Types of thermal analysis – TG (Thermogravimetric) analysis: weight – DTA (Differential Thermal Analysis): temperature – DSC (Differential Scanning Calorimetry): temperature – DIL (Dilatometry): length – TMA (Thermo Mechanical Analysis): length (with strain) – DMA (Dynamic-Mechanical Analysis): length (dynamic) – DEA (Dielectric Analysis): conductivity – Thermo Microscopy: image – Combined methods DTA/DSC First introduced by Le Chatelier in 1887, perfected by Roberts-Austen 1899 Sample Reference Oven heated at controlled rate Temperature and temperature difference -
Differential Scanning Calorimetry Beginner's Guide
FREQUENTLY ASKED Differential Scanning QUESTIONS Calorimetry (DSC) DSC 4000 DSC 8000 DSC 8500 with Autosampler DSC 6000 with Autosampler PerkinElmer's DSC Family A Beginner's Guide This booklet provides an introduction to the concepts of Differential Scanning Calorimetry (DSC). It is written for the materials scientist unfamiliar with DSC. The differential scanning calorimeter (DSC) is a fundamental tool in thermal analysis. It can be used in many industries – from pharmaceuticals to polymers and from nanomaterials to food products. The information these instruments generate is used to understand amorphous and crystalline behavior, poly- morph and eutectic transitions, curing and degree of cure, and many other material properties used to design, manufacture and test products. DSCs are manufactured in several variations, but PerkinElmer is the only company to make both single and double-furnace styles. We’ve manufactured thermal analysis instrumentation since 1960, and no one understands the applications of DSC like we do. In the following pages, we answer common questions about what a DSC is, how the instruments work, and what they tell you. Table of Contents 20 Common Questions about DSC What is DSC? ................................................................................................3 What is the difference between a heat flow and a heat flux DSC? ...................3 How does the difference affect me? ..............................................................3 Why do curves point in different directions? ...................................................4