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diff --git a/3689/CH4/EX4.4/4_4.sce b/3689/CH4/EX4.4/4_4.sce
new file mode 100644
index 000000000..5c7b07849
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+////Varialble Declaration
+ms = 1.423           //Mass of Na2SO4, g
+mw = 100.34          //Mass of Na2SO4, g
+DT = 0.037           //Change in temperature for solution, K
+Mw = 18.02           //Molecular wt of Water
+Ms = 142.04          //Molecular wt of ms Na2SO4
+Ccal = 342.5         //Calorimeter constant, J/K
+Cpw = 75.3 
+//Data
+DHfNa = -240.1
+DHfSO4 = -909.3
+DHfNa2SO4 = -1387.1
+
+//Calculation
+DHs = (-Ms/ms)*((mw/Mw)*Cpw*DT+Ccal*DT)
+DHsolD = 2*DHfNa + DHfSO4 - DHfNa2SO4
+
+//Results
+printf("\n Enthalpy of solution for Na2SO4 %4.2e J/mol",DHs)
+
+printf("\n Enthalpy of solution for Na2SO4 from Data %4.2e J/mol",DHsolD)
+