PHYSICAL CHEMISTRY EDUCATION – THE 2014 THEMED ISSUE OF CHEMISTRY EDUCATION RESEARCH AND PRACTICE

The July 2014 issue of the Chemistry Education Research and Practice is dedicated to physical chemistry education. Major sub-themes are: the role of controversies in PC education, quantum chemistry, chemical thermodynamics (including a review of research on the teaching and learning of thermodynamics) and PC textbooks. Topics covered include: the significance of the origin of PC in connection with the case of electrolyte solution chemistry; the true nature of the hydrogen bond; using the history of science and science education for teaching introductory quantum physics and quantum chemistry; a module for teaching elementary quantum chemistry; undergraduate students’ conceptions of enthalpy, enthalpy change and related concepts; particulate level models of adiabatic and isothermal processes; prospective teachers’ mental models of vapor pressure; an instrument that can be used to identify students’ alternative conceptions regarding thermochemistry concepts; and the organization/sequencing of the major areas of PC in many PC textbooks.


Introduction
Physical chemistry (PC) is considered as one of the fundamental and essential courses in the undergraduate curricula of all chemistry and many other departments.It is also perceived as a difficult course by students and instructors alike.A number of chemistry and scienceeducation studies have focused on general aspects of teaching and learning PC (Derrick and Derrick, 2002;Hahn and Polik, 2004;Nicoll and Francisco, 2001;Sözbilir, 2004), as well as on students' difficulties of understanding and misconceptions in various areas of PC.For a review see Tsaparlis (2008).
The 2014 special issue of Chemistry Education Research and Practice (CERP) 1 , published in July 2014, is dedicated to physical chemistry education and its multiple facets and aspects -historical, philosophical, psychological, conceptual, contextual, experimental, theoretical, mathematical, computational, phenomenological and molecular -as well as to its various areas, such as classical thermodynamics, electrochemistry, chemical kinetics, 1 Chemistry Education Research and Practice (CERP) is a peer-reviewed electronic-only journal, which is published by the Royal Society of Chemistry, and is free to access, for both publication and to read articles: http://www.rsc.org/cerp.CERP's authors and readers extend to all over the world, while since 2008 the journal is included in the Social Science Citation Index.The latest (2013) impact factor is 1.309, making CERP a leading journal for teachers, researchers, and other practitioners in chemistry education.
quantum chemistry, statistical thermodynamics, spectroscopy, etc.Many of these aspects are reflected in this themed issue.

Short review of the contents
The issue starts with an editorial article2 by the themed issue editors (Tsaparlis and Finlayson, 2014), which provides an extended preview of the contributions, and where  Tumay (2014) distinguishes between mental models and misconceptions and derives prospective teachers' mental models of vapour pressure.Finally, assessment is the focus of the study by Wren and Barbera (2014), who report on quantitative evidence for the uses and interpretations of data from their thermochemistry concept inventory.
The Tsaparlis paper ( 2014) examines the organization/sequencing of the major areas of PC in PC textbooks.As an ultimate research question, the author asks if there is an 'optimum teaching-learning sequence' for undergraduate instruction for the various major areas of PC.
According to the author, this is a controversial issue, which cannot be answered solely by the analysis of textbooks, but a wide range of information should be considered.

Two further papers
Two further papers missed the publication date of the themed issue.One paper is now published in CERP (Nyachwaya and Wood, 2014).The authors analyzed a sample of 12 PC textbooks that are commonly used in the United States.They found that symbolic representations were most common, followed by sub-microscopic ones, while macroscopic representations were used least.The other paper will be published in CERP in January 2015 (Yalçınkaya and Boz, 2015).It investigates the effect of case-based instruction on 10th grade students' understanding of gas concepts.According to the findings, case-based instruction was an effective method for overcoming students' alternative conceptions about the gas concepts.

Perspectives for future research in physical chemistry education
The call for papers for this themed CERP issue included an extended list of indicative topics for contribution.They were as follows:  The topics that are covered in the themed issue are shown in italics, while the remaining topics are not represented.Although there had been manuscripts submitted for this themed issue for some of these topics, other topics lacked submissions.Finally, key areas for future education research in the special domain of physical chemistry are outlined in the editorial article.This may be a useful starting point for those researchers interested in emerging themes for future research in physical chemistry education.
appropriate highlights common elements between contributions.The editorial concludes with insights into the areas for future research in PC education and a postscript on controversies and disjunctiveness in PC education.The presentation in the editorial reflects the organization of the papers in the themed issue, and has the following sections: The history of physical chemistry and the role of controversies in education; Quantum chemistry; Thermodynamics; Physical chemistry textbooks; Looking ahead: emerging themes for future research in physical chemistry education.Three papers deal with old or current controversies in PC and how these can be used for the advancement of PC education.de Berg (2014) considers the significance of the origin of PC as reflected in the ionists vs. hydrationists controversy in connection with the case of electrolyte solution chemistry, and in particular with the data on osmotic pressure, which led to an equation of state for aqueous solutions.Weinhold and Klein (2014)  address the understanding of the true nature of hydrogen bonding, based both on quantum chemical calculations and on experimental data, with the aim of contributing to resolving the longstanding controversy between electrostatic 'dipole-dipole' vs. 'partial covalency' descriptions of hydrogen bonding.Finally, the lessons from the history of quantum physics in relation to the ongoing controversy over its interpretations and foundations are considered by Greca and Freire Jr. (2014) as a way of improving the teaching of quantum physics and quantum chemistry.In addition to the two papers by Weinhold and Klein and by Greca and Freire Jr., two further papers deal with educational aspects of quantum chemistry.Dangur, Avargil, Peskin and Dori (2014) developed a module for teaching elementary quantum chemistry, emphasizing interdisciplinary real-life applications and investigated the effect of the module on the visual and textual understanding of quantum mechanical concepts.Barradas-Solas and Sánchez Gómez (2014) examine the omnipresence in textbooks and research literature of graphical and pictorial representations of the so called 'chemical orbitals' as they are used to represent both chemical structures and processes (e.g.reaction mechanisms).Five papers deal with the teaching and learning of thermodynamics.Bain, Moon, Mack, and Towns (2014) review systematically the literature from different discipline-based education research resources: chemistry, physics, engineering, and undergraduate mathematics education.Nilsson and Niedderer (2014) study undergraduate students' conceptions of enthalpy, its change and related thermochemistry concepts.Making a shift from classical thermodynamics,Hernández, Criswell, Kirk, Sauder, and Rushton (2014) consider a number of issues related to the particulate-level models of adiabatic and isothermal processes in upper-level (advanced undergraduate and beginning graduate) chemistry courses.

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The abstract nature of physical chemistry  Conceptual understanding in the various sub-disciplines of physical chemistry  Concept learning versus mathematical approach to physical chemistry  Assessment of physical chemistry -testing for conceptual understanding or  mathematical manipulation  Mathematical coverage and mathematical rigour: how much and how far?  Problem solving related to physical chemistry  The physical chemistry laboratory  The physical chemistry curriculum  The role of textbooks in the teaching of physical chemistry  The interface of physical chemistry with the other branches of chemistry  Physical chemistry in context  Computational chemistry IMPLEMENTING INNOVATIONS IN A NON-FORMAL STUDENT LABORATORY CONTEXT 571 Use of symbolic mathematics engines for data analysis, model building, and problem solving  Computer simulations and online learning in physical chemistry  Physical chemistry concepts and topics as part of general chemistry courses at  second and third level  Reviews and perspectives (including historical perspectives).