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+ //example 4
+//percentage of vapor 
+clear
+clc
+vliq=0.1 //volume of saturated liquid in m^3
+vf=0.000843 //in m^3/kg
+vvap=0.9 //volume of saturated vapor R-134a in equilbrium
+vg=0.02671 //in m^3/kg
+mliq=vliq/vf //mass of liquid in kg 
+mvap=vvap/vg //mass of vapor in kg
+m=mliq+mvap //total mass in kg
+x=mvap/m //percentage of vapor on mass basis
+disp('hence,% vapor on mass basis is 22.1')
+\ No newline at end of file