initial commit / add all books

6 files changed, 62 insertions, 0 deletions

diff --git a/1367/CH21/EX21.1/21_1.sce b/1367/CH21/EX21.1/21_1.sce
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+++ b/1367/CH21/EX21.1/21_1.sce
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+//Find Concentration Gradient and diffusivity

+//Ex:21.1

+clc;

+clear;

+close;

+c_cu=2*10^13;//concentration of copper in /m^3

+c_al=4*10^6;//concn of copper on other side of Al in /m^3

+t=3*10^-3;//thickness in m

+z=(c_cu-c_al)/t;//z=dm/dx,concentration graient

+disp(z,"Concentration Gradient (in /m^4) = ");

+jx=10^21;//outward flux of copperv atoms in /sq m/sec

+d=-jx/z;//diffusivity in sq m/sec

+disp(d,"Diffusivity (in sq m/sec) = ");
\ No newline at end of file
diff --git a/1367/CH21/EX21.1/21_1r.txt b/1367/CH21/EX21.1/21_1r.txt
new file mode 100755
index 000000000..3f0e2854c
--- /dev/null
+++ b/1367/CH21/EX21.1/21_1r.txt
@@ -0,0 +1,7 @@
+Concentration Gradient (in /m^4) =    

+ 

+    6.667D+15  

+ 

+ Diffusivity (in sq m/sec) =    

+ 

+  - 150000.03  
\ No newline at end of file
diff --git a/1367/CH21/EX21.2/21_2.sce b/1367/CH21/EX21.2/21_2.sce
new file mode 100755
index 000000000..cbc10147a
--- /dev/null
+++ b/1367/CH21/EX21.2/21_2.sce
@@ -0,0 +1,17 @@
+//Find Concentration Gradient and diffusivity and rate

+//Ex:21.2

+clc;

+clear;

+close;

+c_n=12;//nitrogen concentration in kg/m^3

+t=6*10^-3;//thickness in m

+z=(c_n-0)/t;//concentration gradient in kg/m^4

+disp(z,"concentration gradient (in kg/m4) = ");

+d0=5*10^-7;//in sqm/sec

+q=75*10^3;//in j/mol

+r=8.314;//in J/mol/K

+t=400;//in K

+dx=d0*exp(-q/(r*t));//diffusivity in sqm/sec

+disp(dx,"Diffusivity (in sqm/sec) = ");

+jx=-z*dx;//rate of flow of nitrogen in kg/sqm/sec

+disp(jx,"Rate at which nitrogen escapes (in kg/sqm/sec) = ");
\ No newline at end of file
diff --git a/1367/CH21/EX21.2/21_2r.txt b/1367/CH21/EX21.2/21_2r.txt
new file mode 100755
index 000000000..565e2a7c0
--- /dev/null
+++ b/1367/CH21/EX21.2/21_2r.txt
@@ -0,0 +1,11 @@
+ concentration gradient (in kg/m4) =    

+ 

+    2000.  

+ 

+ Diffusivity (in sqm/sec) =    

+ 

+    8.028D-17  

+ 

+ Rate at which nitrogen escapes (in kg/sqm/sec) =    

+ 

+  - 1.606D-13  
\ No newline at end of file
diff --git a/1367/CH21/EX21.4/21_4.sce b/1367/CH21/EX21.4/21_4.sce
new file mode 100755
index 000000000..242cd9d10
--- /dev/null
+++ b/1367/CH21/EX21.4/21_4.sce
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+//Calculate  Activation Energy in Silver diffusion

+//Ex:21.4

+clc;

+clear;

+close;

+z=8;//ratio of diffusion in silicon at 1350 C and 1100 C

+x=log(z);

+q=x/(1.35*10^-5);//activation energy for silver diffusion in J/mol

+q1=q/1000;//in kJ/mol

+disp(q1,"Activation Energy in Silver diffusion (in kJ/mol) = ");
\ No newline at end of file
diff --git a/1367/CH21/EX21.4/21_4r.txt b/1367/CH21/EX21.4/21_4r.txt
new file mode 100755
index 000000000..36cd2af2d
--- /dev/null
+++ b/1367/CH21/EX21.4/21_4r.txt
@@ -0,0 +1,4 @@
+  

+ Activation Energy in Silver diffusion (in kJ/mol) =    

+ 

+    154.03271  
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