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diff --git a/1571/CH8/EX8.15/Chapter8_Example15.sce b/1571/CH8/EX8.15/Chapter8_Example15.sce
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+clc
+clear
+
+//INPUT
+t=303;//temperature of the one mole of the argon in K
+v1=1;//intial volume in litres
+v2=10;//final volume in litres
+r=8.31*10^7;//universal gas constant in ergs/K.mol
+
+//CALCULATIONS
+w=r*t*log(v2/v1);//work done in isothermal expansion in ergs
+
+//OUTPUT
+mprintf('the work done in isothermal expansion is %3.2f ergs',w)