DOI: 10.1039/B1RP90032C
(Paper)
Chem. Educ. Res. Pract., 2001, 2, 329-332
SIMPLE DEMONSTRATIONS OF THE ENERGY EXCHANGE BETWEEN SYSTEM AND ITS SURROUNDING
(Note: The full text of this document is currently only available in the PDF Version )
Dragica ŠIŠŠOVIĆ*a and
Nikola ŠIŠŠOVIĆb
aUniversity of Belgrade, Faculty of Chemistry, Serbia
bUniversity of Belgrade, Faculty of Physics, Serbia
Received
17th April 2001
, Accepted 15th July 2001
Abstract
Demonstrating of energy changes is performed by observing physical or chemical changes that are started in the system in contact with the reaction vessel, in which heating or cooling takes place. The procedures for two short experiments in high school general chemistry course (age of 15) are described: (i) hydration of unslaked lime – melting of ice; and (ii) hydration of sulphuric acid − ether cannon. The demonstrations enable active acquiring of thermochemistry concepts. [Chem. Educ. Res. Pract. Eur.: 2001, 2, 329-332]