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【简答题】
始态为25 °C, 200 kPa的5 mol某理想气体,经a、b两不同途径到达相同的末态。 途经a先经绝热膨胀到-28. 57 °C 、100kPa,过程的功Wa=-5.57 kJ;再恒容加热到压力 200 kPa的末态,过程的热Q=25.42 kJ。途径b为恒压加热过程。求途径Wb及 Qb
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