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+//Exa 4.8

+clc;

+clear;

+close;

+// Given data

+p1 = 0.01;// in N/mm^2

+p1 = p1 * 10^3;// in kN/m^2

+p2 = 50;// in kN/m^2

+v1 = 5;// in m^3

+v2 = 1.5;// in m^3

+Gamma = 1.4;

+// Formula p1*v1^n = p2*v2^n

+n= log(p2/p1)/log(v1/v2);

+disp(n,"Part (a)    The value of n is : ")

+disp("The process followed during air compression is POLYTROPIC");

+// Part (b)

+disp("Part (b)    The law of the process is p*v^"+string(n)+" = constant");

+// Part (c)

+W= (p1*v1-p2*v2)/(n-1);// in kNm or (kJ)

+disp(W,"Part (c)    Work done during the process in kJ is : ");

+disp("The -ve sign indicates that the work has been done on the system")

+// Part (d)

+Q = ((Gamma - n)/(Gamma - 1) * W);// in kJ

+disp(Q,"Part (d)    Heat transfer during the process in kJ is :");

+disp("The -ve sign indicates that the heat is rejected from the system")