Determine the change in specific entropy in kJ/(kg ? K) between the states:?

(a) Air, P₁ = 0.1 MPa, T₁ = 20?C, P_2?= 0.1 MPa, T_2?= 120?C;(b) Air, P₁ = 1 bar, T₁ = 27 ?C, P_2?= 3 bar, T_2?= 377?C;(c) Carbon dioxide, P_1?= 150 kPa, T_1?= 30?C, P_2?= 300 kPa, T_2?= 300?C;(d) Carbon monoxide, T_1?= 300 K, ?_1?= 1.1 m³/kg, T_2?= 500 K, v_2?= 0.75 m³/kg;(e) Nitrogen, P_1?= 2 MPa, T_1?= 800 K, P₂ = 1 MPa, T₂ = 300 K.Employ the ideal gas model and the data in Appendix A.1. For air, use the method of Appendix A.2.

Data From Appendix A.1

Transcribed Image Text:

Fluid Argon Hydrogen Nitrogen Oxygen Carbon Water (liquid) Carbon monoxide Carbon dioxide Ammonia Methane Ethane Propane n-Butane Acetylene Benzene (liquid) Chemical formula Ar H₂ N₂ 0₂ C H₂O со CO₂ NH3 CHA C₂H6 C3H8 C4H10 C₂H₂ C6H₁ M/ kg/kmol 39.948 2.016 28.013 31.999 12.011 18.015 28.010 44.010 17.031 16.043 30.069 44.096 58.123 26.038 78.113 R/ J/(kg. K) 208.1 4124.7 296.8 259.8 692.2 461.5 296.8 188.9 488.2 518.3 276.5 188.6 143.0 319.3 106.4 Cp / J/mol K 20.786 28.836 29.124 29.378 8.540 75.300 29.141 37.135 35.630 35.695 52.487 73.597 99.167 44.036 135.950 ĥº/ kJ/mol 0 0 0 0 0 -285.830 -110.530 -393.510 -45.940 -74.600 -84.000 -103.847 -124.727 227.400 49.080 J/(mol. K) 154.845 130.680 191.608 205.148 5.694 69.950 197.658 213.783 192.768 186.369 229.161 270.313 310.030 200.927 173.450