[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fA-wcQtmTKfVtO7KurEvbUPBVTMC5N9ieWN2y09Vw3eo":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2024-05-12 23:18:03",143142266,[8,9,10,11],"0<n<l","1<n<k","n>k","n→∞",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},16,"cc30b7d12410d7d0f0201c4e56a88836","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F509c80cc20098b58f7c72ebf2ab09717.jpg","工程热力学","a226f855624f4ca6a1cf46c85018d6df","06气体和蒸汽的基本热力过程","工质进行了一个吸热、升温、压力下降的多变过程,则多变指数( )",[21,32,41,50,59,68,77,86,89,98],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],143142259,[25,26,27,28],"313","40","400","350","容积为2m3的储气罐内盛有tl=20℃、P1=500kPa的空气[已知Cp=1.005kJ\u002F(kg·K),Rg=0.287kJ\u002F(kg·K).若使压力提高到P2=1MPa,空气的温度将升高到( )℃.[2006年真题]","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],143142260,[36,37,38,39],"271J\u002F(kg·K)","297J\u002F(kg·K)","445J\u002F(kg·K)","742J\u002F(kg·K)","某热力过程中,氮气初态为v1=1.2m3\u002Fkg和p1=0.1MPa,终态为v2=0.4m3\u002Fkg和p2=0.6MPa,该过程的多变比热容cn为( )",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],143142261,[45,46,47,48],"0.50","1.16","1.0","-1.3","空气的初始容积V1=2m压力P1=0.2MPa、温度Tl=40℃,经某一过程被压缩为V2=0.5m3,P2=1MPa.该过程的多变指数是( ).[2006年真题]",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],143142262,[54,55,56,57],"64.8kJ\u002F(kg·K)","64.8J\u002F(kg·K)","52.37kJ\u002F(kg·K)","102.3J\u002F(kg·K)","1kg空气从压力3MPa和温度800K,进行一不可逆膨胀过程到达终态,其终态压力为1.5MPa,温度为700K.若空气的气体常数为0.287kJ\u002F(kg·K)、绝热指数为1.4,此过程中空气的熵变化量是( ).[2007年真题]",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],143142263,[63,64,65,66],"1.46","1.35","1.25","1.10","理想气体初态V1=1.5m3,P1=0.2MPa,终态V2=0.5m3,P2=1.0MPa,其多变指数为( ).[2010年真题]",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":30,"type":31},[],143142264,[72,73,74,75],"Q=W","Q>W","Q<W","Q与W无关","理想气体定温膨胀,必然有( )",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":30,"type":31},[],143142265,[81,82,83,84],"定容加热过程中,加热量全部提高了系统的热力学能","定压过程中,系统必定输出体积变化功而热力学能增大","定温加热过程中,加热量全部用于系统做体积膨胀功","绝热膨胀过程中,系统减少热力学能而输出体积变化功","在有关理想气体4种基本过程特征的下列陈述中,( )不正确",{"answer":87,"createTime":5,"id":6,"options":88,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":30,"type":31},[],143142267,[93,94,95,96],"温度","压力","热力学能","熵","理想气体可逆吸热过程,下列哪个状态参数是一定增加的?( )",{"answer":99,"createTime":5,"id":100,"options":101,"question":106,"source":30,"type":31},[],143142268,[102,103,104,105],"降低","增大","不变","不定","对密闭容器中的汽水混合物加热,其干度"]