1 files changed, 37 insertions, 0 deletions
diff --git a/647/CH12/EX12.20/Example12_20.sce b/647/CH12/EX12.20/Example12_20.sce
new file mode 100755
index 000000000..ae651ae35
--- /dev/null
+++ b/647/CH12/EX12.20/Example12_20.sce
@@ -0,0 +1,37 @@
+clear;
+clc;
+
+// Example: 12.20
+// Page: 505
+
+printf("Example: 12.20 - Page: 505\n\n");
+
+// Solution
+
+//Reactions:
+// CO + (1/2)O2 ------------> CO2 ......................................(1)
+// C + O2 ------------------> CO2 ......................................(2)
+// H2 + (1/2)O2 ------------> H2O ......................................(3)
+// C + 2H2 -----------------> CH4 ......................................(4)
+
+// Elimination of C:
+// Combining Eqn. (2) with (1):
+// CO + (1/2)O2 ------------> CO2 ......................................(5)
+// Combining Eqn. (2) with (4):
+// CH4 + O2 ----------------> 2H2 + CO2 ................................(6)
+
+// Elimination of O2:
+// Combining Eqn. (3) with (4):
+// CO2 + H2 ----------------> CO + H2O .................................(7)
+// Combining Eqn. (3) with (6):
+// CH4 + 2H2O -------------> CO2 + 4H2 .................................(8)
+
+// Equations 7 & 8 are independent sets. Hence
+r = 2;// [No. of independent rkn.]
+C = 5;// [No. of component]
+P = 1;// [No. of phases]
+s = 0;// [No special constraint]
+// Applying Eqn. 12.81
+F = C - P + 2 - r - s;// [Degree of freedom]
+printf("No. of independent reaction that occur is %d\n",r);
+printf("No. of Degree of freedom is %d",F);
+\ No newline at end of file