单选题:根据下列条件,回答问题:(8分)[物理——物理3-3] 一定质量的理想气体由状态A经状态B变为状态C,其中AB过程为等压

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根据下列条件,回答问题:(8分)[物理——物理3-3]
一定质量的理想气体由状态A经状态B变为状态C,其中AB过程为等压变化,BC过程为等容变化。已知VA=0.3m3,TA=TB=300K、TB=400K

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