AiR is to be compreesd reversibly from an initial condition of 1 atm and 60(*f) to a final state of 5 atm and 60(*f) by three different processes: (a)heating at contant volume followed by cooling at constant pressure. (b)isothermal compression (c)adiabatic compression followed by cooling at constant volume Air may be considered as ideal gas with Cv=5 and Cp=7(btu)/(lb moa)(*f) ,the initial volume=379ft^3 .the final volume=75.8ft^3 计算(1)the work required (2)the heat transferred (3)the change in the internal energy of the gas (4)the change in the enthalpy of the gas fr the three processes *是度F 题目可能很简单... 但是小弟我看不太懂= =!!它是怎麽算的 还有一题证明 (1)k is the joule-thomson coefficient 这个我没学过... 又要麻烦各位高手了... 很抱歉... --

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