1 files changed, 6 insertions, 6 deletions
diff --git a/3428/CH21/EX14.21.17/Ex14_21_17.sce b/3428/CH21/EX14.21.17/Ex14_21_17.sce
index 5de637d7f..511388b60 100644
--- a/3428/CH21/EX14.21.17/Ex14_21_17.sce
+++ b/3428/CH21/EX14.21.17/Ex14_21_17.sce
@@ -1,14 +1,14 @@
 //Section-14,Example-4,Page no.-PC.31
 //To calculate pressure using ideal gas equation and vanderwall`s gas equation.
 clc;
-n=12
-R=0.0821
-T=298
-V=10.0
+n=12                    //moles
+R=0.0821                        //Latm/molK
+T=298                             //K
+V=10.0                          //L
 P_1=((n*R*T)/V)
 disp(P_1,'Pressure from ideal gas equation(atm)')
-a=1.49
-b=0.0399
+a=1.49                        //atm/mol^2
+b=0.0399                         //L/mol
 P_2=(((n*R*T)/(V-(n*b)))-((a*n^2)/(V^2)))
 disp(P_2,'Pressure from Vander walls gas equation(atm)')