Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 431315
Title On the relation between the fundamental equation of thermodynamics and the energy balance equation in the context of closed and open systems
Author(s) Knuiman, J.T.; Barneveld, P.A.
Source Journal of Chemical Education 89 (2012)8. - ISSN 0021-9584 - p. 968 - 972.
Department(s) Physical Chemistry and Colloid Science
Publication type Refereed Article in a scientific journal
Publication year 2012
Abstract In this paper, we elaborate on the connection between the fundamental equation of thermodynamics, which is essentially the combination of the First and Second Laws of thermodynamics, and the energy balance equation in the context of closed and open systems. We point out some misinterpretations in attempts to derive the fundamental equation from these First and Second Laws of thermodynamics, which occur in several textbooks. These errors are connected with incorrect interpretations of heat and work terms in relation to changes of the entropy and internal energy change of the system. The consequences of matter transfer for the formulation of the First and Second Laws are often not properly taken into account, and there is a widespread misinterpretation of what is called ‘chemical work’. In this paper, we present a correct derivation of the fundamental equation from the basic laws of thermodynamics, through a careful analysis of matter transfer to an open system. This provides insight into the meaning of ‘chemical work’.
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