How do you calculate number of phases?
How do you calculate number of phases?
The phase rule is commonly given in the form P + F = C + 2. The term P refers to the number of phases that are present within the system, and C is the minimum number of independent chemical components that are necessary to describe the composition of all phases within the system.
What is the congruent melting point of the compound mgzn2 in mg Zn system?
590°C
1 Zn-Mg system Both metals enter into chemical combination and form an intermetallic compound MgZn2 and melts at 590°C to give a liquid of the same composition. Hence, 590°C is the congruent melting point of the system.
What is condensed phase rule draw phase rule diagram of Ag Pb system and explain it?
F = C – P + 1 … known as condensed phase rule. In two component systems there are four possible phases solid Ag, solid Pb, solution of Ag, + Pb and vapour. Since the pressure has no effect on equilibrium so the system can be represented by temperature concentration diagram at constant atmospheric pressure.
What is number of phase?
The term P refers to the number of phases that are present within the system, and C is the minimum number of independent chemical components that are necessary to describe the composition of all phases within the system.
What is the number of phases and components in the following reaction?
What is the number of phases and components present in the following reaction? Explanation: Since we have two solids and one gaseous component in the above reaction, we have 3 phases. Also since under equilibrium, the gaseous component may evaporate, we have only two components.
What is congruent melting point in phase diagram?
“A compound is said to have a congruent melting point when it melts sharply at a constant temperature into a liquid of the same compositions as that of solid form from which it is derived.” The temperature is called congruent melting point.
What is condensed phase rule?
A condensed phase rule is the one used to represent the phase diagram of a condensed system, either liquid or solid. In such a case, for two or more components, the phase diagram becomes multidimensional. Look at, F = C – P + 2, for one phase, 2 – 1 + 2 = 3 and the phase diagram will have three dimensions.
What is condensed phase rule equation?
The system in the figure has been examined at atmospheric pressure; because the pressure variable is fixed, the phase rule is expressed as P + F = C + 1. In this form it is called the condensed phase rule, for any gas phase is either condensed to a liquid or is present in negligible amounts.
What is Gibbs phase rule for condensed system?
Note that many phase diagrams consider only one intensive parameter (e.g. T-Xfluid, where T is intensive, and the mole fraction of fluid is related to the amount of mass of the fluid components); in this case, the Gibbs Phase Rule would be: P + F = C + 1.