. A commentary on the scientific writings of J. Willard Gibbs. Gibbs, Joniah Willard, 1839-1908; Science; Thermodynamics. HETEROGENEOUS EQ UILIBRIUM 239 liquid at 0°C. is taken as zero or some other value. The entropy of the vapor is greater than that of the liquid by the entropy of vaporization, that is, the heat of vaporization divided by the absolute temperature. In the case of the volume, only the specific volume of the vapor is plotted, as that of the liquid is so small that it cannot be shown on the scale of the dia- gram. Let us now consider some actual so /OO /so 200 T£Mf>e
. A commentary on the scientific writings of J. Willard Gibbs. Gibbs, Joniah Willard, 1839-1908; Science; Thermodynamics. HETEROGENEOUS EQ UILIBRIUM 239 liquid at 0°C. is taken as zero or some other value. The entropy of the vapor is greater than that of the liquid by the entropy of vaporization, that is, the heat of vaporization divided by the absolute temperature. In the case of the volume, only the specific volume of the vapor is plotted, as that of the liquid is so small that it cannot be shown on the scale of the dia- gram. Let us now consider some actual so /OO /so 200 T£Mf>e/fATUff£ /-V OeSRSES Cef^TJORADe Z50 300 Fig. 1. The specific entropy of liquid water and of saturated water vapor, the specific volume of saturated water vapor, and the vapor pressure of water, plotted against temperature. At zero degrees centigrade, if the entropy of the Hquid is zero, that of the vapor is calories. The specific volume of water vapor in equilibrium with liquid at zero degrees is 206 liters per gram; it is evident that the volume of the liquid, 1 cc, is negligible in comparison. In the equation dp dt v" - V 4}V «)i the terms must all be of the same kind; if the slope of the p-t curve is given in atmospheres per degree, and the volume in. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Donnan, F. G. (Frederick George), 1870-1956; Haas, Arthur Erich, 1884-1941. New Haven, Yale University Press; London, H. Milford, Oxford University Press
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Keywords: ., bookcentury1900, booksubjectscience, booksubjectthermodynamics
