★理想气体的熵 aS 6\ T J/(kg. K )orJ/(mol K)I ∫c+Rhn 2 dT RI △ d b +c 理想气体变比热熵差计算 △s=s0-s0-Rln g★理想气体的熵   δ d J/(kg K) J /(mol K) q s or T =   可逆 2 2 g 1 1 d V ln T v c R T v +  2 2 g 1 1 d p ln T p c R T p −  2 2 1 1 d d p V v p c c v p +   2 1  = = s sd  理想气体变比热熵差计算 0 0 2 2 1 g 1 ln p s s s R p  = − −