途径A p1=16×105Pa 恒温膨胀 P2=1×105Pa V=1×10-3m3 P外=1X105Pa V3=16×10-3m3 WA=-P外△V =-1X105Pa×(16-1)×10-3m3 =-1500J 24=-WA=1500Jp1 = 16×105Pa V1 = 1×10-3m3 p2 = 1×105Pa V2 = 16×10-3m3 恒温膨胀 途径 A p外 = 1×105Pa WA ＝ - p外∆V ＝ -1×105Pa ×(16 – 1)×10-3m3 ＝ - 1500 J QA ＝ - WA ＝ 1500 J