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%。
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 inorgonie 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 ealeulated results is just 2%.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2009年第2期41-43,共3页
Journal of National University of Defense Technology
基金
国家部委资助项目(41101050202)
