810 48.7=16.1℃ 0.00374 0.00374 60×487=112℃ 0.00374 t3=112℃ 1_1280×487=102℃ 0.00374 T=1337℃ =1334-16.1=1173℃ T=1173-4.5-1=1121℃ T2=112.1℃ t2=1121-11.2=100.9℃ T2=1009-72-1=927℃ T2=927℃ t3=927-112=81.5℃ T=81.5-2.7-1=778℃ T=778℃ t4=778-10.2=67.6℃ T=676-31-1=63.5℃ ④查汽化热:71=1337℃→y1=2168J/kg T′=1121℃→y=2227kJ/kg T2=92.7℃→y2=2277//kg48.7 16.1 0.00374 810 1 0.00374 1 1  1 = t =  = K t ℃ 48.7 11.2 0.00374 1160 1 t 2 =  = ℃ t 3 =11.2 ℃ 48.7 10.2 0.00374 1280 1 t 4 =  = ℃ T1 =133.7 ℃ t 1 =133.4 −16.1=117.3 ℃ T1  =117.3− 4.5−1=112.1 ℃ T2 =112.1 ℃ t 2 =112.1−11.2 =100.9 ℃ T2  =100.9 − 7.2 −1= 92.7 ℃ T3 = 92.7 ℃ t 3 = 92.7 −11.2 = 81.5 ℃ T3  = 81.5− 2.7 −1= 77.8 ℃ T4 = 77.8 ℃ t 4 = 77.8−10.2 = 67.6 ℃ T4  = 67.6 −3.1−1= 63.5 ℃ ④ 查汽化热： T1 =133.7 ℃ → 1 = 2168kJ / kg T1  =112.1 ℃ → 1  = 2227kJ / kg T2  = 92.7 ℃ → 2  = 2277kJ / kg