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diff --git a/3689/CH5/EX5.7/5_7.sce b/3689/CH5/EX5.7/5_7.sce
new file mode 100644
index 000000000..17be6288c
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+++ b/3689/CH5/EX5.7/5_7.sce
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+////
+//Variable Declaration
+n = 1.0                //Number of moles of CO2
+T = 300.0              //Temeperatures of Water bath, K
+vi = 25.0     //Initial and final state Volume of Ideal Gas, L
+vf = 10.0
+R = 8.314              //Ideal Gas Constant, J/(mol.K) 
+
+//Calcualtions
+qrev = n*R*T*log(vf/vi)
+w = -qrev
+dSsys = qrev/T
+dSsur = -dSsys
+dS = dSsys + dSsur
+
+//Results
+printf("\n Entropy change of surrounding is %4.1f J/(mol.K)",dSsur)
+
+printf("\n Entropy change of system is %4.1f J/(mol.K)",dSsys)
+
+printf("\n Total Entropy change is %4.1f J/(mol.K)",dS)
+