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diff --git a/172/CH8/EX8.7/ex7.sce b/172/CH8/EX8.7/ex7.sce
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+//example 7
+//work and heat transfer
+clear
+clc
+P2=500  //final pressure in cylinder in kPa
+P1=100 //initial pressure in cylinder in kPa
+T1=20+273.2 //initial temperature inside cylinder in Kelvins
+n=1.3 
+T2=(T1)*(P2/P1)^((n-1)/n) //final temperature inside cylinder in K
+R=0.2968 //gas constant in kJ/kg-K
+w12=R*(T2-T1)/(1-n) //work in kJ/kg
+Cvo=0.745 //specific heat at constant volume in kJ/kg-K
+q12=Cvo*(T2-T1)+w12 //heat transfer in kJ/kg
+printf(" \n hence,work done is w12=%.1f kJ/kg.\n",w12)
+printf("\n and heat transfer are q12=%.1f kJ/kg.\n",q12)
+\ No newline at end of file