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diff --git a/2939/CH9/EX9.7/Ex9_7.sce b/2939/CH9/EX9.7/Ex9_7.sce
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+//Ex9_7
+
+clc;
+
+// Given:
+
+k1=3.78;
+k2=2.79;
+t1=298;// in K
+t2=353;// in K
+R=8.314// Gas constant
+
+// Formula: log(k1/k2)=(H/R)*((t2-t1)t1*t2)
+
+// Solution:
+
+H=R*log(k1/k2)/((t2-t1)/(t1*t2));
+
+printf("The enthalpy for the exchange reaction is = %f J",H)
+
+
+
+
+
+
+