Professional paper

https://doi.org/10.15255/KUI.2016.038

Chemistry in Education:
From Temperature Changes to Reaction Enthalpies

Tajana Preočanin orcid.org/0000-0002-6670-6503 ; Division of Physical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb Horvatovac 102a 10 000 Zagreb, Croatia
Josip Požar ; Division of Physical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb Horvatovac 102a 10 000 Zagreb, Croatia
Nenad Raos (ur.) ; Institute for Medical Research and Occupational Health Ksaverska c. 2, P.O.B. 291, 10 001 Zagreb, Croatia

Abstract

The relationship between internal energy and enthalpy was analysed, stating the reasons why the energy changes accompanying chemical reactions are usually characterized by enthalpy changes instead of internal energy changes. The changes within a system during the course of a chemical reaction were analysed in detail. The calculation of reaction enthalpy from the results of calorimetric measurements were explained.


This work is licensed under a Creative Commons Attribution 4.0 International License.

Keywords

internal energy; enthalpy; exchange of energy; heat; chemical reaction; chemical education

Hrčak ID:

173729

URI

https://hrcak.srce.hr/173729

Publication date:

5.2.2017.

Article data in other languages: croatian

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