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diff --git a/3765/CH3/EX3.7/Ex3_7.sce b/3765/CH3/EX3.7/Ex3_7.sce
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+clc
+// Example 3.7.py
+// For the normal shock that occurs in front of the pitot tube in Example 3.6, 
+// calculate the entropy change across the shock. 
+
+
+// Variable declaration
+M1 = 2.34          // mach number from example 3.6
+R = 1716.0         // gas constant (ft lbf/slug/R) 
+
+// Calculations 
+// subscript 2 means downstream of the shock
+
+po2_by_po1 = 0.5615       // from shock table A2 for mach M1
+//
+dels = -R*log(po2_by_po1) // s2 - s1 (in lb/slug R)
+
+// Result 
+printf("\n Change is entropy is %.1f lb/slug R", dels)
+