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In chemistry, the lever rule is a formula used to determine the mole fraction (x i) or the mass fraction (w i) of each phase of a binary equilibrium phase diagram.It can be used to determine the fraction of liquid and solid phases for a given binary composition and temperature that is between the liquidus and solidus line.
A horizontal line (isotherm or tie line) can be drawn through any such system point, and intersects the curve for each phase at its equilibrium composition. The quantity of each phase is given by the lever rule (expressed in the variable corresponding to the x-axis, here mole fraction).
Statements of Financial Accounting Standards No. 133, Accounting for Derivative Instruments and Hedging Activities, commonly known as FAS 133, is an accounting standard issued in June 1998 by the Financial Accounting Standards Board (FASB) that requires companies to measure all assets and liabilities on their balance sheet at “fair value”.
A tie line from the liquid to the gas at constant pressure would indicate the two compositions of the liquid and gas respectively. [14] A simple example diagram with hypothetical components 1 and 2 in a non-azeotropic mixture is shown at right. The fact that there are two separate curved lines joining the boiling points of the pure components ...
This equal area rule can also be derived by making use of the Helmholtz free energy. [24] In any event the Maxwell construction derives from the Gibbs condition of material equilibrium. However, even though g f = g g {\displaystyle g_{f}=g_{\text{g}}} is more fundamental it is more abstract than the equal area rule, which is understood ...
The FASB Accounting Standards Codification is the source of authoritative GAAP recognized by the FASB to be applied by nongovernmental entities. Rules and interpretive releases of the SEC under authority of federal securities laws are also sources of authoritative GAAP for SEC registrants. In addition to the SEC's rules and interpretive ...
I have just modified the sentence about the isotherm (or tie line) to specify that it is drawn through the arbitrary system point; that is why the point is on the tie line. The question you might want to ask is: Is the phase rule about a point, or about a diagram? Is it just the lever rule that extends the point to the rest of the diagram?
IFRSs create accounting volatility that does not reflect the economic reality. Charles Lee, professor of accounting at Stanford Graduate School of Business, has also criticised the use of fair values in financial reporting. [43] In 2019, H David Sherman and S David Young criticised the current state of financial reporting under IFRS and US GAAP ...