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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /1919/CH5/EX5.17/Ex5_17.sce | |
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initial commit / add all books
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diff --git a/1919/CH5/EX5.17/Ex5_17.sce b/1919/CH5/EX5.17/Ex5_17.sce new file mode 100755 index 000000000..30fc913b8 --- /dev/null +++ b/1919/CH5/EX5.17/Ex5_17.sce @@ -0,0 +1,29 @@ +
+// Theory and Problems of Thermodynamics
+// Chapter 5
+//Second Law of Thermodynamcis
+// Example 17
+
+clear ;clc;
+
+//Given data
+T1 = 263.15 // temperature of supercooled liquid water in K
+T2 = 273.15 // final temperature of liquid water in K
+Cp = 4.2 // specific heat(Isobaric) in kJ/kg K
+Lw = 333.43 // latent heat of fusion of water at 0 *C in kJ/kg
+
+// Calculations for determining mass of water
+deff('y=mass(X)', 'y = Cp *(T2 - T1) - Lw * X') // Energy balance
+X = fsolve(0,mass) // Mass of water solified in kg
+
+// entropy change for system from T1 to T2 temperature
+S1 = Cp*log(T2/T1)
+
+// entropy change for system for phase change from liquid to ice
+S2 = Lw*X/T2
+
+S = (S1 - S2)*1e3 // Total entrophy change in J/K
+
+// Output Results
+mprintf('The mass of water which solidifies = %4.3f kg', X)
+mprintf('\n The entrophy change associated = %6.4f J/K', S)
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