|
|
| Home > JCE Print > Journal of Chemical Education > Issues >
2007
>
March
> |
|
In the Laboratory
|
|
|
|
Introduction of Differential Scanning Calorimetry in a General Chemistry Laboratory Course: Determination of Thermal Properties of Organic Hydrocarbons
|
Ronald D’Amelia, Thomas Franks, and William F. Nirode
Department of Chemistry, Hofstra University, Hempstead, NY 11549
|
|
March 2007
Vol. 84 No. 3
p. 453
|
|
|
|
| Abstract |
|
In first-year general chemistry undergraduate courses, thermodynamics and thermal properties such as melting points and changes in enthalpy (ΔH) and entropy (ΔS) of phase changes are frequently discussed. Typically, classical calorimetric methods of analysis are used to determine ΔH of reactions. Differential scanning calorimetry (DSC) is a rugged, easy-to-use instrumental method for thermal analysis determinations. DSC has become more commonly used in the chemistry curriculum, finding its way into the physical chemistry, analytical chemistry, and even in some general chemistry courses. The work described herein discusses the use of DSC in a general chemistry laboratory course to determine thermal properties such as melting points, ΔfusionH, ΔfusionS, and introduce the concept of polymorphism for organic hydrocarbons.
|
| Supplement |
Instructor notes, student handouts, fact sheet on thermal analysis, and safety precautions using the DSC are available.
|
|
| More Information |
|
Citation |
D’Amelia, Ronald; Franks, Thomas; Nirode, William F. J. Chem. Educ. 2007 84 453.
|
|
Keywords |
Alkanes / Cycloalkanes; First-Year Undergraduate / General; Hands-On Learning / Manipulatives; Instrumental Methods; Laboratory Instruction; Physical Chemistry; Physical Properties; Thermal Analysis
|
|
History |
Created:
Last Updated: |
2/1/2007
2/16/2007
|
|
|
|
|
|
 Caution! | | Experiments, laboratory exercises, lecture demonstrations, and other descriptions of the use of chemicals, apparatus, instruments, computers, and computer interfaces are presented in the Journal of Chemical Education as illustrative of new or improved ideas or concepts in chemistry instruction and are directed at qualified teachers. Although every effort is made to assure and encourage safe practices and safe use of chemicals, the Journal of Chemical Education cannot assume responsibility for uses made of its published materials. Many chemicals are hazardous. Precautions for the safe use of hazardous chemicals and directions for their proper disposal are described in the Material Safety Data Sheets and on the labels. We strongly urge all those planning to use materials from our pages to make choices and to develop procedures for laboratory and classroom safety in accordance with local needs and situations. |
|
|
| |
|
| Home > JCE Print > Journal of Chemical Education > Issues >
2007
>
March
> Page
453
|
|
|
| JCE HS CLIC |
|
Our Secondary School editors work hard to distill all the JCE materials to produce a fraction of particular interest to high school teachers. We call it CLIC.
|
| Contributions Welcome |
| JCE welcomes your submission |
| Advertisers |
| In recent years we have worked hard to better match our advertisers with our readers. When shopping for chemistry education materials, visit our advertisers' WWW sites first. |
| Be An Ambassador |
| Take JCE along on your outreach missions. Copies of the Journal, guest access to JCE Online, our publications catalog, and more are available for your participants. |
|
