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diff --git a/2015/CH6/EX6.7/6_7.sce b/2015/CH6/EX6.7/6_7.sce
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+clc
+//initialisation of variables
+x1=3025 // according to 20 bar pressure and 300 degrees temp
+x2=2262 //according to 20 bar pressure and 300 degrees temp
+x3=2039 //according to 20 bar pressure and 300 degrees temp
+x4=2896 //according to 20 bar pressure and 300 degrees temp
+x5=2817 //according to 20 bar pressure and 300 degrees temp
+x6=2728 //according to 20 bar pressure and 300 degrees temp
+x7=2699 //according to 20 bar pressure and 300 degrees temp
+x8=2592 //according to 20 bar pressure and 300 degrees temp
+x9=2525 //according to 20 bar pressure and 300 degrees temp
+x10=2430 //according to 20 bar pressure and 300 degrees temp
+x11=2398 //according to 20 bar pressure and 300 degrees temp
+x12=2262 //according to 20 bar pressure and 300 degrees temp
+x13=2192 //according to 20 bar pressure and 300 degrees temp
+//CALCULATIONS
+ieff=(x1-x2)/(x1-x3)
+feff=(x1-x4)/(x1-x5)
+seff=(x4-x6)/(x4-x7)
+teff=(x6-x8)/(x6-x9)
+oeff=(x8-x10)/(x8-x11)
+yeff=(x10-x12)/(x10-x13)
+ced=(x1-x5)+(x4-x7)+(x6-x9)+(x8-x11)+(x10-x13)
+rf=ced/(x1-x3)
+//RESULTS
+printf('cumulative enthaloy drop is %2f',ced)
+printf('\nreheat factor is %2f',rf)