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//Calculate the Entropies change for the System ,Surrouding and Universe for the reaction N2(g)+3H2(g)=2NH3(g)
//Example 5.9
clc;
clear;
Sbar1=192.5; //Standard Molar Entropy of NH3 in J K^-1 mol^-1
Sbar2=191.5; //Standard Molar Entropy of N2 in J K^-1 mol^-1
Sbar3=130.6; //Standard Molar Entropy of H2 in J K^-1 mol^-1
delSsys=(2*Sbar1)-((Sbar2)+(3*Sbar3)); // Entropy change for the system in J K^_1 mol^-1
printf("Entropy change of the System = %.0f J K^-1 mol^-1",delSsys);
T=298; //Temperature in K
delHsys=-92.6; //Enthalpy change of the system in kJ mol^-1
delHsur=-delHsys; //Enthalpy change for the surroundind in kJ mol^-1
delSsur=(delHsur*1000)/T; //Entropy change for the surrouding in J K^_1 mol^-1
printf("\nEntropy chnage for the Surrouding = %.0f J K^-1 mol^-1",delSsur);
delSsur1=311; //Entropy change for the surrouding in J K^_1 mol^-1(delSsur1=delSsur)
delSuniv=delSsys+delSsur1; //Entropy change for the universe in J K^_1 mol^-1
printf("\nEntropy chnage for the Universe = %.0f J K^-1 mol^-1",delSuniv);
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