![09. [16 marks; 2, 1,8,5] The phase diagram of bismuth and gold is given below. 1100 Liquid Solution L 700 E- CS: 1/°C L = Au(](http://img.homeworklib.com/questions/09b35180-c716-11ea-88a2-ad4a1121547f.png?x-oss-process=image/resize,w_560)
Homework Answers
(a ) determining the formula of 'C' :
at this point: mole fraction 0.50 % Bi + mole fraction 0.50 % Au
thus Au : Bi ratio : 1: 1
thus formula of 'C' : AuBi .
(b) area marked by 'X' : Bi(s) + L
(c) isolepth x(Au) : 0.45 ; 700 K :
- at S : Liquid solution
- S to T : on cooling at constant composition we towards two phase system
- at T : it is phase change line : L ==> L <==> Au (s)
- T to U : we further cooling at constant composition we towards another two phase system
- at U : it is phase change line : L <==> Au (s) ====> L <==> C (s)
- U to V : we further cooling at constant composition we towards another two phase system
- at V : it is phase change line : L <==> C (s) ==> Bi(S) + C(s)
- below V : two phases : Bi(S) + C(s)
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09. [16 marks; 2, 1,8,5] The phase diagram of bismuth and gold is given below. 1100...
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