Why is it called the inverse lever rule?
This figure also helps us understand why these equations are called “the lever rule.” Sometimes it is also known as the “reverse arm rule,” because for the calculation of αL (liquid) you use the “arm” within the (yA-xA) segment closest to the vapor, and for the vapor calculation (αG) you use the “arm” closest to the …
How do you calculate the lever rule?
The composition of the alloy is represented by the fulcrum, and the compositions of the two phases by the ends of a bar. The proportions of the phases present are determined by the weights needed to balance the system. and, fraction of phase 2 = (C – C1) / (C2 – C1).
Which rule is used to determine the phases in phase diagram?
Concept: The lever rule is a rule used to determine the mole fraction or the mass fraction 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.
What is meant by phase rule?
The phase rule states that F = C − P + 2. Thus, for a one-component system with one phase, the number of degrees of freedom is two, and any temperature and pressure, within limits, can be attained.
What is phase rule equation?
Which of the following is wrong about a phase diagram?
Following is wrong about a phase diagram : (1) It gives information on transformation rates (2) Relative amount of different phases can be found under given equilibri conditions. (3) It indicates the temperature at which different phases start to melt (4) Solid solubility limits are depicted by it..
What are the factors that affect phase rule?
The variables are: the number of phases P (forms of matter; i.e., solid, liquid, and gas not necessarily of a single chemical component), the number of chemical components C (pure compounds or elements), and the number of degrees of freedom F of intensive variables, such as temperature, pressure, and percentage .