Question

Question 4

The following figures and tabulated data were obtained during the Phase diagram experiment for Pb-Sn using DSC machine. Tables 1-4 shows the wt% composition of Sn in Pb at 1) Use figures 1 and 2, and Table 1 to plot the Temperature 2) Use the figures 1 and 2, and Table 2 to plot the different temperatures (°C) against wt% composition of Sn in Pb Temperature (°C) against wt% composition of Sn in Pb on the same graph obtained from (1) above 3) Use Table 3 to plot the Temperature (°C) against wt% composition of Sn in Pb on the same graph obtained from (2) above 4) Use Table 4 to plot the Temperature (°C) against wt% composition of Sn in Pb on the same graph obtained from 5) Determine the eutectic wt% composition and Temperature 6) What is the temperature at which 80wt%Pb-20wt%Sn will 7) What is the temperature at which 86wt%Pb-14wt%Sn will 8) At 50 °C, what will be the wt% compositions on the solvus 9) What is the wt% compositions of α and L at 80wt%Pb- (3) above. (4-points) (1-points) touch the liquidus line (1points) touch the solidus line. (1points) lines. (1-points) 20wt%Sn when the temperature is exactly 250 °C. (2- points) exo Figure 1 : 1 00wt% of Sn ( Pure Sn) Figure 2: 100wt% of Pb (Pure Pb) Table 1: Four different wt% compositions ofSn in Pb 83 183 83 Table 2: Three different wt% compositions ofSn in Pb 183 97.5 Table 3: Three different wt% compositions ofSn in Pb 30 Table 4: Two different wt% compositions ofSn in Ph 97.5 30

Answer 1

The plots for 1 to 4 are enclosed.

From Fig 1. The onset melting point for pure Sn is 230 ^OC ( 100% wt % Sn)

From Fig 2. The onset melting point for pure Pb is 318 ^OC ( 0 wt % Sn in Pb)

vib fre.xlsx Excel Chart Tools shravani srinivas X File Home Insert Page Layout Formulas Data Review View Help ChemOffice12 Design FormatTell me what you want to do Chart 1 wt%of 1 |Table 1 |wrt 96 of |Table 2 |wt%ofTable 3 |wt%of C) Sn Table 4 Sn wt% Vs Temperature Curve-Phase Diagram of Sn-Pb 0.0 318.0 2 3 19.0 4 40.0 5 61.9 6 97.5 7 100.0 318.0 19.0 183.0 183.0 10.0 120.099.0 -Table 1 Temp (DC) Table 2 Temp OC] -Table 3 Temp (OC) -← Table 4 Temp IOC) 183.0 40.0 238.0 30.0 400.0 183.0 61.9 183.0 30.0 183.0 183.0 100.0 230.0 227.0 320.0 230.0 240.0 2000 160.0 14 17 40.0 19 0.0 0.0 10.0 20.0 40.0 50.0 of Sn in Pb 21 70.0 80.0 100.0 Sheet1Sheet2 + 100% O Type here to search