In condensed phases, this quantity is proportional to its saturation value multiplied by the exponential of an integral representing the effects of pressure on molar volume; that factor is named for Poynting.
In condensed phases, this quantity is proportional to its saturation value multiplied by the exponential of an integral representing the effects of pressure on molar volume; that factor is named for Poynting. The logarithm of this quantity's namesake coefficient is the integral of the compressibility factor minus one all over the pressure with respect to pressure. The logarithmic derivative of this quantity with respect to mole fraction is equal for each component of a binary mixture according to the Duhem-Margules relation, while this quanity is proportional to mole fraction according to the Lewis-Randall rule. The activity of a component of a mixture is defined as the ratio of this quantity at current conditions to standard conditions. FTP, name this quantity, equal to pressure for an ideal gas, which expresses a substance's tendency to escape.
In condensed phases, this quantity is proportional to its saturation value multiplied by the exponential of an integral representing the effects of pressure on molar volume; that factor is named for Poynting.
fugacity [accept "coefficient of fugacity" before "coefficient"]