不定项选择题:如图,一绝热容器被隔板K隔开成a、b两部分。已知a内有一定量的稀薄气体,b内为真空。抽开隔板K后,a内气体进入b,最终达

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  • 题目类型:不定项选择题
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题目内容:
如图,一绝热容器被隔板K隔开成a、b两部分。已知a内有一定量的稀薄气体,b内为真空。抽开隔板K后,a内气体进入b,最终达到平衡状态。在此过程中
A.气体对外界做功,内能减少
B.气体不做功,内能不变
C.气体强变小,温度降低
D.气体压强变小,温度不变
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