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+//ques-25.14
+//Calculating pressure for ammonia gas using ideal gas equation and van der Waals equation
+clc
+n=0.6;//moles of NH3
+V=3;//volume (in L)
+T=273+25;//temperature (in K)
+a=4.17;//(in L^2 atm/mol^2)
+b=0.0371;//(in L/mol)
+//Van der Waal's
+P1=(n*0.0821*T)/(V-n*b)-(a*n^2)/V^2;
+//Ideal Gas'
+P2=(n*0.0821*T)/V;
+printf("The value of pressure according to ideal gas equation is %.3f atm and according to van der Waals equation is %.3f atm.",P2,P1);