由氨的T-S圖求1kg氨由0.828Mpa(8.17atm)的飽和液體節(jié)流膨脹至0.0689Mpa(0.68atm)時的下述數據: (a)膨脹后有多少氨汽化; (b)膨脹后溫度為多少; (c)分離出氨蒸氣在壓縮p2=0.552MPa=5.45atm,tˊ2=?(絕熱可逆壓縮)