Sign/Direction of dS related with oQ 82ner>0, then ds>0 ds (9 82ner=0, then dS =0 82net<0, then ds 0 dS=0:The reversible,adiabatic process is called an isentropic process. 上游充通大学 April 18,2018 10 SHANGHAI JLAO TONG UNIVERSITYApril 18, 2018 10 Sign/Direction of dS related with δQ dS = 0: The reversible, adiabatic process is called an isentropic process.    Q then dS Q then dS Q then dS net net net       0 0 0 0 0 0 , ,