Question

EBB236 -6- (a) The compound Ca,B,Os-Casio, form a simple eutectic system with no solid solubility. Using the following data and assuming the liquid solutions to be ideal, calculate and sketch the phase boundary for the system given. Determine the eutectic point and the composition. Sebatian Ca,B,Os-Casio, membentuk sistem eutektik tanpa keterlarutan popejal. Menggunakan data berikut dan mengandalkan larutan cecair adalah ideal, kira dan lakarkan sempadan fasa bagi sistem tersebut. Tentukan titik eutektik dan komposisinya. Ca Bo caso 1583 1813 Melting point, K Takat lebur Heat of fusion (J/mole) Haba pelakuran 100,834 56,066 Note : Use the graph paper provided to sketch the phase boundary Nota : Guna kertas graf yang diberikan untuk melakarkan sempadan fasa (50 marks/markah)

Answer 1

a simple a, A. The compound cag B,0g - Casioz form eutectic system with no. solid stability. Casioz. [ca, B205 melting point k, 1963 Heat of fusion (El mole) 100, 834 1813 56, 066 7 the composition and temperature of a cutatic can be calculated from enthalpy and entropy of fusion Temperature of of each components The gibts free enxergy depends on its Ethand (att) Own differential. Solid-liquid diagra, ( c) C 30TH 0 0 29 30 G H-TS => Hz htts 1/622-5>> HOG-T 19 ) (E) CO 1: V. 1.- à al -H, R7 - Am wohl system is a homogeneous mixtee of the con that melts or solidifies at a single tempera - ture that is lower than the melting point of 'ther of the Consklients. conversely as a non-eutecke mixture coo's docos, each mixtures component will solidify at a distinct temperature, until all materials is solid,