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+//Engineering and Chemical Thermodynamics

+//Example 3.2

+//Page no : 119

+

+//Solution(a)

+clear ; clc ; 

+//Given 

+del_U = 0 ; // As no work or heat transfered across its boundaries during the process 

+T_1 = 500 ; // [K]

+V1 = 1.6682 / 2 * 10^-3; // [m^3]

+V2 = 2 * V1 ; 

+del_S_sur = 0 ; // As no heat transfered across its boundaries during the process 

+disp(" Example 3.2   Page no : 119")

+disp("(a)");

+disp("  For an ideal gas u = u(T only)") ; 

+printf('\n   Final temperature = %g K \n\n',T_1);

+

+//Solution(b)

+q_rev = 8.314 * T_1 * log(V2/V1) ;

+del_S_sys = q_rev / T_1 ;

+del_S_univ = del_S_sys + del_S_sur ;

+printf('(b)\n\n  Entropy change for universe = %.2f J/(molK)',del_S_univ);