6. 一空氣壓縮機進口的參數為 $P_1 = 0.1\text{MPa}$，$T_1 = 28^\circ\text{C}$，$v_1 = 0.88\text{m}^3/\text{kg}$，壓縮後出口的參數為 $P_2 = 0.6\text{MPa}$，$T_2 = 82^\circ\text{C}$，$v_2 = 0.173\text{m}^3/\text{kg}$，假設壓縮過程為絕熱，$\Delta u_{12} = u_2 - u_1 = 40\text{kJ/kg}$，空壓機消耗的功為？($\text{kJ/kg}$)
(A) 40
(B) 55.8
(C) 65.4
(D) 32.2
(E) 70.8

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