| 关于《物理化学》教材中一道习题的讨论 |
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| 引用本文： | 郝斌,刘大成,丛丽娜.关于《物理化学》教材中一道习题的讨论[J].唐山学院学报,2011,24(3):110-111. |
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| 作者姓名： | 郝斌 刘大成 丛丽娜 |
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| 作者单位： | 唐山学院环境与化学工程系,河北唐山,063000 |
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| 摘 要： | 对《物理化学》教材中一道关于熵变计算的习题进行了讨论,指出求系统熵变时,要先根据所研究的系统条件进行分析,因为条件不同(绝热恒容和绝热恒压),所应用的公式也不同(ΔU=ΔU(A)+ΔU(B)=0,ΔH=ΔH(A)+ΔH(B)=0)。由此提出在利用物理化学公式时,必须正确理解每个公式的适用条件和范围,否则就会走进误区,不能得到正确的结论。
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| 关 键 词： | 熵变 公式 适用条件 物理化学 |
Discussion on a Question of Physical Chemistry Teaching Material |
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| HAO Bin,LIU Da-cheng,CONG Li-na.Discussion on a Question of Physical Chemistry Teaching Material[J].Journal of Tangshan College,2011,24(3):110-111. |
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| Authors: | HAO Bin LIU Da-cheng CONG Li-na |
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| Institution: | HAO Bin,LIU Da-cheng,CONG Li-na(Department of Environment & Chemical Engineering,Tangshan College,Tangshan 063000,China) |
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| Abstract: | The paper discusses an exercise about entropy change in Physical Chemistry.When entropy change is demanded,we should analyze it according to the system condition studied.If the conditions are different(thermal insulation and constant volume,thermal insulation and constant voltage),the formulas used are different(ΔU=ΔU(A)+ΔU(B)=0,ΔH=ΔH(A)+ΔH(B)=0).So it is preferable that you must understand the condition of application and scope of every formula as you use physical chemistry formula,or you will go into the wrong area so that you can’t get the right conclusion. |
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| Keywords: | entropy change formula condition of application Physical Chemistry |
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