%0 Journal Article %1 Ahrendts1980 %A Ahrendts, Joachim %D 1980 %J Energy %K 1980 exergy SLA %N 8-9 %P 666 - 677 %R 10.1016/0360-5442(80)90087-0 %T Reference states %U http://dx.doi.org/10.1016/0360-5442(80)90087-0 %V 5 %X Reference states crucially determine the availability of all systems. This paper examines the necessary conditions imposed on any definition of reference states by thermodynamic theory, and stresses the requirement of the reference system to be in internal equilibrium. The degree of determination of the reference system necessary for availability balances is discussed. The reference systems in current use are reviewed, and it is shown that they are not suitable to give an accurate value of the chemical contribution to a system's availability. To include the chemical contribution in a consistent way, the author proposes an equilibrium system formed by the atmosphere, the oceans, and a layer of the solid crust of the earth to define a reference state. There is a surprising implication concerning the availability of oxygen, which is discussed.

@article{Ahrendts1980, abstract = {Reference states crucially determine the availability of all systems. This paper examines the necessary conditions imposed on any definition of reference states by thermodynamic theory, and stresses the requirement of the reference system to be in internal equilibrium. The degree of determination of the reference system necessary for availability balances is discussed. The reference systems in current use are reviewed, and it is shown that they are not suitable to give an accurate value of the chemical contribution to a system's availability. To include the chemical contribution in a consistent way, the author proposes an equilibrium system formed by the atmosphere, the oceans, and a layer of the solid crust of the earth to define a reference state. There is a surprising implication concerning the availability of oxygen, which is discussed.}, added-at = {2011-01-19T18:05:18.000+0100}, author = {Ahrendts, Joachim}, biburl = {https://www.bibsonomy.org/bibtex/2a1c57b90149afaa6280100ee32ca5604/thorade}, description = {ScienceDirect - Energy : Reference states}, doi = {10.1016/0360-5442(80)90087-0}, interhash = {fd9a9c92541bc840feea322d0099d127}, intrahash = {a1c57b90149afaa6280100ee32ca5604}, issn = {0360-5442}, journal = {Energy}, keywords = {1980 exergy SLA}, note = {Second law analysis of energy devices and processes}, number = {8-9}, pages = {666 - 677}, timestamp = {2011-01-19T18:05:18.000+0100}, title = {Reference states}, url = {http://dx.doi.org/10.1016/0360-5442(80)90087-0}, volume = 5, year = 1980 }