Answer to Question #145809 in Physical Chemistry for deepak

Question

Determine the log(pso2) vs. log(po2) expression for boundary lines to demarcate predominant
Cu2S, Cu and Cu2O solid phases for Cu-O-S system at 727oC and 1 atm total pressure. You may use
the standard free energy change values (G
0
, Kcal) at 727oC for the following reactions: [R = 1.987

Cal/mole/K] i) 2Cu(s) +0.5O2(g) = Cu2O(s), G

0 = -22.7; ii) 2Cu(s) + 0.5S2(g) = Cu2S(s), G

0 = -24.05;

iii) S2(g) + 2O2(g) = 2SO2(g), G

0 = -138.64

Answer 1

Using Matlab plot the deposition rate (on a log scale) versus 1/T ( Kelvin) for 600 - 1200 °C for a CVD system