| Na_2SO_4·10H_2O相变过程及其相变潜热的计算 |
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| 引用本文： | 满亚辉,吴文健.Na_2SO_4·10H_2O相变过程及其相变潜热的计算[J].国防科技大学学报,2009,31(2). |
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| 作者姓名： | 满亚辉 吴文健 |
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| 作者单位： | 国防科技大学,航天与材料工程学院,湖南,长沙,410073 |
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| 摘 要： | 利用CDR-34P差动热分析仪测试Na2SO4·10H2O相变前后的热效应,结合Na2SO4-H2O体系的二元相图,分析相变前后热效应的来源及体系相态、组分的变化;提出无机水合盐相变潜热除来源结晶水脱离外还包括固相物质溶解、溶液浓度梯度变化的热效应的观点;根据上述相变过程计算Na2SO4·10H2O相变潜热,误差仅为2%.
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| 关 键 词： | Na2SO4·10H2O 相变潜热 计算 |
Analysis of Phase Change for Na2SO4·10H2O and Calculation on Latent Heat |
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| MAN Ya-hui,WU Wen-jian.Analysis of Phase Change for Na2SO4·10H2O and Calculation on Latent Heat[J].Journal of National University of Defense Technology,2009,31(2). |
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| Authors: | MAN Ya-hui WU Wen-jian |
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| Institution: | College of Aerospace and Material Engineering;National Univ.of Defense Technology;Changsha 410073;China |
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| Abstract: | The enthalpies of phase change have been studied by means of CDR-34p Differential Scanning Calorimetry(DSC) and Phase diagram for Na2SO4-H2O system.The current study found that latent heat for inorgonic hydrated salt is made of reaction enthalpies,dissolution heats,integral dissolution heats.In addicition,the latent heat of phase change was calculated.Compared with experimental data,the relative error of the calculated results is just 2%. |
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| Keywords: | hydrated salt phase change of latent heat calculation |
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