evre kuralı

Turkish - English

Definition of evre kuralı in Turkish English dictionary

phase rule

the rule which states that the number of degrees of freedom in a system at equilibrium equals the number of components minus the number of phases plus 2

Thus, if the components be salt and water, and the phases salt, ice, saturated solution, and vapor, the system is invariant, that is, there is only one set of conditions under which these four phases can exist in equilibrium

If only three phases be considered, the system is univariant, that is, the fixing of one condition, as temperature, determines the others

It may be stated thus: The degree of variableness (number of degrees of freedom) of a system is equal to the number of components minus the number of phases, plus two

For example, the system of water vapor, liquid water, and solid ice has zero degrees of freedom because the three phases of vapor, liquid, and solid coexist in the one component, water

A generalization with regard to systems of chemical equilibrium, discovered by Prof

Willard Gibbs

A rule stating that the number of degrees of freedom in a material system at equilibrium is equal to the number of components minus the number of phases plus the constant

Hyphenation

ev·re ku·ra·lı