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1 . 气体的等温变化 PowerPoint PPT Presentation


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1 . 气体的等温变化. 体积. 压强. 温度. 一、玻意耳定律 1 . 气体状态参量 气体的三个状态参量为 、 、 . 2 . 实验探究 (1) 实验装置:如图所示,实验的研究对象是 .. 被封闭的. 气体. 压力表. 刻度. (2) 实验数据收集 空气柱的压强 p 可以从 上读出,空气柱的长度 L 可以从注射器两侧的 上读出,则空气柱的体积为长度 L 与横截面积 S 的乘积,即 V = LS . 用手把柱塞向下压或向上拉,读出若干组 与 的值. (3) 实验数据处理

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1 . 气体的等温变化

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  • 1


  • 1

  • 2

  • (1)


  • (2)

  • pLLSVLS.

  • (3)

p

V



  • 3

  • (1)

  • (2)pVC()p1V1p2V2.

  • (3)


  • pV

  • 1pV

  • pVt1<t2.


  • 1

  • CD

  • pAp0ph.


  • 2()

  • UAB

  • (pAph0)S(p0phph0)S.pAp0ph.

  • 3()F0


  • UabABa10 cmb5 cm75 cmHgAB


  • ABpApBSapASmagp0SpaSgh1Smag


  • pASpaSp0S

  • pAp0pa75 cmHg10 cmHg

  • 65 cmHg

  • b

  • pBSpbSpAS

  • pBpApb65 cmHg5 cmHg60 cmHg.

  • 65 cmHg60 cmHg


  • 1p1V1p2V2

  • 2p1V1p2V2CCC


  • 3

  • (1)pVpV


  • T1T2T1T2.


  • pVT()


  • D


  • P20

  • T2>T1pVC()CC()T2>T1.


  • AB39 cmA40 cm.B2 cm

  • (1)p

  • (2)l.(p076 cmHg)


  • (1)78 cmHg(2)38 cm

  • (1)

  • (2)pV

  • (3)


  • 11h5 cml45 cm

  • (1)

  • (2)(75 cmHg )


  • (1)(2)42 cm


  • ()

  • A

  • B

  • CT1T2

  • DT1T2


  • ABCDABD.

  • ABD


  • 21pV()

  • A

  • BAB

  • CAB

  • D


  • pVABABA

  • ABABpVBC

  • D

  • BCD


  • 1()

  • AB

  • C D

  • BC.

  • BC


  • 2DABC()

  • ADA

  • BAB

  • CAB

  • DBC


  • DAAABAB()BCBCVpTD

  • A


  • 3(2010)()

  • A B

  • C D


  • B.

  • B


  • 4pVV15 Lp1________PaV210 Lp2________PaV315 Lp3________Pa.


  • p1p3pVp13105 Pap31.0105 Pa.ABp1V1p2V2p13105 PaV15 LV210 L31055p210p21.5105 Pa.

  • 31051.51051105


  • 512 cm.2 cm(p01.0105 Pag10 m/s2)

  • hS


  • 2 m


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