磷酸氢二铵在水和乙醇-水中的体积性质研究  

Studied on volumetric properties of diammonium phosphate in the water and ethanol-water

作　　者：孟祥芮 陈慧萍[1] 张国荣[1] MENG Xiangrui CHEN Huiping ZHANG Guorong(School of Resources, Environmental and Chemical Engineering, Nanchang University, Nanchang 330031, China)

机构地区：[1]南昌大学资源环境与化工学院,江西南昌330031

出　　处：《南昌大学学报（工科版）》2016年第3期224-229,共6页Journal of Nanchang University(Engineering & Technology)

摘　　要：利用密度计测定了293.15~323.15 K下磷酸氢二铵（DAP）在水和乙醇-水中的密度。分别计算了磷酸氢二铵-水二元溶液及磷酸氢二铵-乙醇-水三元溶液中磷酸氢二铵的表观摩尔体积Vφ,把这些数据进行非线性拟合得到了标准偏摩尔体积V0φ,进一步回归计算得到了标准偏摩尔等压膨胀系数E0φ。结果表明：当磷酸氢二铵质量摩尔浓度一定时,Vφ随温度的升高而增大;当温度一定时,Vφ随着磷酸氢二铵质量摩尔浓度的增大而减小。标准偏摩尔体积V0φ和标准偏摩尔等压膨胀系数E0φ都是正值,且随乙醇浓度的增大而增大。The densities of the diammonium phosphate（ DAP） in water and ethanol-water have been measured at 293. 15- 323. 15 K by density gauge. Apparent molar volumes Vφfor diammonium phosphate in the diammonium phosphate-water binary solutions and diammonium phosphate-ethanol-water ternary solutions have been calculated respectively,and these data can be obtained standard partial molar volumes V0φby nonlinear fitting,then further regression calculations the limiting apparent molar expansibility E0φwas obtained. The results showed that： when the concentration of diammonium phosphate was constant,apparent molar volume increases with temperature increasing;when a certain temperature,apparent molar volume increases with the diammonium phosphate molar mass increasing. Standard partial molar volumes and the limiting apparent molar expansibility E0φwere positive,and as mass percentage of ethanol increasing.

关 键 词：磷酸氢二铵 密度 表观摩尔体积 标准偏摩尔体积 

分 类 号：O629.711[理学—有机化学]