Thermal Methods - Pace University

Thermal Methods - Pace University

Thermal Methods Its Hot in Here Lets talk Thermal By: Naaimat Muhammed Introduction

A general accepted definition of thermal analysis is a group of techniques in which a physical property of a substance and/or its reaction products is measured as a function of temperature while the substance is subjected to a controlled temperature program. We will confine to three of the methods, which provide primarily chemical rather than

physical information about samples of matter. Three Methods 1. Thermogravimetry (TG) 2. Differential thermal analysis (DTA) 3. Differential scanning calorimetry (DSC)

Thermogravimetric Methods In thermo gravimetric analysis, the mass of a sample in a controlled atmosphere is recorded continuously as a function of temperature or time as the temperature of the sample is increased (usually linear with time). Thermogravimetry is the measurement of the

mass of a sample as the temperature increases. This method is useful for determining sample purity and water, carbonate, and organic content; and for studying decomposition reactions. Differential Thermal

Analysis (DTA) Differential thermal analysis is the measurement of the difference in temperature between a sample and a reference as heat is applied to the system.

This method is sensitive to endothermic and exothermic processes including: 1. phase transitions 2. Dehydration 3. decomposition 4. Redox 5. solid-state reactions

Differential Scanning Calorimetry (DSC) Differential scanning calorimetry independently measures the rate of heat flow to a sample and a standard that are at the same temperature. Data is taken by monitoring the differential

heat flow as a function of temperature. DSC is useful to make the same measurements as DTA and has the added capability to measure heat capacities. Instrumentation Sensitive analytical balance

Furnace Purge gas system (for providing an inert atmosphere) Microcomputer/microprocessor (for instrument control and data acquisition and display). Thermal gravimetric

Furnace Example of TGA using Weightloss vs. Time Power vs. Temperature Heat content vs.

Temperature References 1. http://www.chem.vt.edu/chem-ed/ crossref/ac-thermal.html 2. Principles of Instrumental Analysis, Skoog, Holler, Nieman; Saunders College Pub. 5th Edition

(1998) 3. http://www.ptli.com/testlopedia/s ubs/TGA-result.htm

Recently Viewed Presentations

  • SNAP-Ed Evaluation in New Mexico - University of Missouri

    SNAP-Ed Evaluation in New Mexico - University of Missouri

    SNAP-Ed Evaluation Framework in New Mexico. Theresa H. Cruz, PhD. Deputy Director, University of New Mexico Prevention Research Center ... Eat Smart to Play Hard Social Marketing Campaign in 5 counties. NMSU Cooperative Extension in all 33 counties. NM SNAP-Ed...
  • Chapter 4: Stereochemistry QuickTime and a TIFF (Uncompressed)

    Chapter 4: Stereochemistry QuickTime and a TIFF (Uncompressed)

    2-methylhexane is an achiral molecule. An atom (usually carbon) with 4 different substituents is called a stereogenic center or stereocenter. Consider two of the compounds we produced while finding all the isomers of C7H16: Enantiomers Two compounds that are non-superimposable...
  • Secondary Transition/Post-School Results Network

    Secondary Transition/Post-School Results Network

    The quote referred to below is from slide #12. ... The Texas Transition and Employment Guide provides youth, young adults, parents and professionals with secondary transition resources to facilitate a young person's progress towards post-secondary goals to education, employment, and...
  • 3D Models and Matching - University of Washington

    3D Models and Matching - University of Washington

    Arial Times New Roman Symbol Helvetica Default Design 3D Models and Matching 3D Models Mesh Models Surface-Edge-Vertex Models Generalized-Cylinders Generalized-Cylinder Models Finding GCs in Intensity Data Octrees Superquadrics 2D Deformable Models 3D Deformable Models Matching Geometric Models via Alignment 3D-3D...
  • The Brooklyn Task Force, RJIP - THE RACIAL JUSTICE ...

    The Brooklyn Task Force, RJIP - THE RACIAL JUSTICE ...

    The Brooklyn Task Force,formed under the auspices of the ABA's Racial Justice Improvement Project. Timeline. ... Cultural and implicit bias and its impact on judicial decision-making. ... The Brooklyn Task Force, RJIP
  • Recherche dans CINAHL - University of Ottawa

    Recherche dans CINAHL - University of Ottawa

    Scénario 3: l'article n'est pas disponible à l'uOttawa. Cliquez ici pour obtenir l'article d'une autre bibliothèque. Biblio RGN jan 2012. N.B.: si vous n'êtes pas déjà inscrit remplissez le formulaire d'inscription de RACER
  • The Persian Empire - calhoun.k12.al.us

    The Persian Empire - calhoun.k12.al.us

    King Darius used a strategy to strengthen the Persian government. He divided his kingdom into 20 satrapies. Each one was ruled by a satrap. To . dominate. the kingdom, Darius needed a good system of communication. One . strategy. to...
  • Title in Arial Bold 32pt sentence case

    Title in Arial Bold 32pt sentence case

    Radio-opaque. Peelable. Sterilizable. High pushability. High flexibility. High and low lubricity. Spooled, cut to length, or cut and slit. Double-bagged. ... Title in Arial Bold 32pt sentence case Category: 2016 - Version 1 Last modified by: Leahy, Maura