For reversible process(可逆过程) dh=-w,=vdp C 1 2 Cac =-vap(B) If C thenp;如果C变大(C>0,则p必减少(dp<0) If C thenp itr果C变小(d<,则p必变小(dp>0 (3)Process Equation k k= For ideal gas(对理想气体)c For real gas, k is an empirical constant.〔对实际气体来二 说k是经验常数)For reversible process (可逆过程) If then ; If then ; (3) Process Equation For ideal gas(对理想气体) For real gas, k is an empirical constant.(对实际气体来 说,k是经验常数) dh = −wt = vdp vdp dc = − 2 2 cdc = −vdp c p c p pv C k = v p c c k = (B) 如果 c 变大（ dc >0),则p必减少(dp<0); 如果 c 变小（ dc <0),则p必变小(dp>0)