Continue Example 37.1 nm"）FpW-n,无 ● Continue Solution: ?? Change of entropy for an ideal gas: (S:-So)=s-s-RIn PL p。 From air tables:(400K)11gK 》Then, s8g-s2T,=300K)=1.702k%gK kJ (s,-s)=(1.9919-1.70 -0287,kJn )kg k kg.K =-0.371%eK 上游究通大粤 May2,2018 12 SHANGHAI JLAO TONG UNIVERSITYMay 2, 2018 12 Continue Example 37.1  Continue Solution: » Change of entropy for an ideal gas: » From air tables: » Then,  1 o    kJ kJ 10 s s 1.9919 1.702 0.287 ln kg K kg K 1 kJ 0.371 kg K                    o o 1 air 1 o o o air o kJ s s T 400K 1.9919 kg K kJ s s T 300K 1.702 kg K         o o 1 1 o 1 o o p s s s s R ln p     F       air,1 o 1 o m u u air 1 o   po V T 1 o V s s  mair   ?? ??