Search results
Results from the WOW.Com Content Network
In chemistry, the mole fraction [7] [8] ... In mechanical engineering, chi is used as a symbol for the reduction factor of relevant buckling loads in the EN 1993, ...
In chemistry, the mole fraction or molar fraction, also called mole proportion or molar proportion, is a quantity defined as the ratio between the amount of a constituent substance, n i (expressed in unit of moles, symbol mol), and the total amount of all constituents in a mixture, n tot (also expressed in moles): [1]
For a small solute, the mole fractions would appear instead, and this modification is the innovation due to Flory and Huggins. In the most general case the mixing parameter, χ {\displaystyle \chi } , is a free energy parameter, thus including an entropic component.
where R is the gas constant, and is the mole fraction of species i contained in the solution. The chemical potential becomes negative infinity when x i = 0 {\displaystyle x_{i}=0} , but this does not lead to nonphysical results because x i = 0 {\displaystyle x_{i}=0} means that species i is not present in the system.
Notice that the Margules function for each component contains the mole fraction of the other component. It can also be shown using the Gibbs-Duhem relation that if the first Margules expression holds, then the other one must have the same shape. A regular solutions internal energy will vary during mixing or during process.
Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities. In these contexts, the capital letters and the small letters represent distinct and unrelated entities.
No standard symbols are used for the following quantities, as specifically applied to a substance: the mass of a substance m, the number of moles of the substance n, partial pressure of a gas in a gaseous mixture p (or P), some form of energy of a substance (for chemistry enthalpy H is common), entropy of a substance S
The mole fraction is defined as the amount ... Symbol Definition SI unit other unit(s) normality / mol/m 3: M (= mol/L) molality / mol/kg m mole fraction / mol/mol ...