Concentrations: Tie-line method a)  locate composition and temperature in diagram b)  In two phase region draw tie line or isotherm c)  note intersection with phase boundaries. Read compositions. Fractions: lever rule a)  construct tie line (isotherm) b)  obtain ratios of line segments lengths.

Equilibrium Phase Diagrams Give  the  relationship  of  composition  of  a  solution  as  a  function  of  temperatures  and  the quantities of phases in equilibrium. These diagrams do not indicate the dynamics when one phase transforms into another. Sometimes diagrams are given with pressure as one of the variables. In the phase diagrams we will discuss, pressure is assumed to be constant at one atmosphere. Binary Isomorphous Systems This very…

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