任意可逆循环的热温商之和为 20, 0 T T T T 2 )+( T T 60, 0 0R-0 T i=1 T T CQR:无限小可逆热15 任意可逆循环的热温商之和为 1 1 T Q + 2 2 T Q =0, 3 3 T Q + 4 4 T Q =0 . ( 1 1 T Q + 2 2 T Q )+( 3 3 T Q + 4 4 T Q )+ .=0 = n i 1 i i T Q =0 = n i 1 i i T Q =∮ T QR =0 QR :无限小可逆热