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+clear;

+clc;

+printf("\t\t\tProblem Number 6.19\n\n\n");

+// Chapter 6: The Ideal Gas

+// Problem 6.19 (page no. 262) 

+// Solution

+

+//from the equation, deltas/cv = (k*log(v2/v1))+ log(p2/p1) //change in entropy

+k=1.4; //k=cp/cv //ratio of specific heats

+//deltas=(1/4)*cv //so, 

+// 1/4= (k*log(v2/v1))+ log(p2/p1)

+v2=1/2; //Because,v2=(1/2)*v1  //initial specific volume 

+v1=1;   //final specific volume

+p2byp1=exp((1/4)-(k*log(v2/v1))); //increase in pressure

+printf("p2/p1=%f\n",p2byp1);

+printf("So,increase in pressure is %f ",p2byp1);