环己酮与环已醇体系的热力学性质 Ⅰ.混合热

在298.15K,使用Picker混合型流动微热量热器测量了苯十环己烷和苯十四氯化碳体系的摩尔过量焓,与文献值相符在1%以内,说明仪器工作性能良好,测量数据可靠.本工作系统测量了环己酮与环己醇在300.15,303.15,308.15,313.15和323.15K时的摩尔混合热.发现在这些温度下混合热的极大值均位于x≈0.5处,混合热曲线对称.该体系的混合热,先随温度的升高而下降,至308.15K左右又缓慢回升.此外,根据实验数据,利用Redlich和Kister方程,计算了300.15K时两组分的偏摩尔混合热.

STUDIES ON THERMODYNAMIC PROPERTIES OF THE BINARY SYSTEM OF CYCLOHEXANONE WITH CYCLOHEXANOL. I. HEATS OF MIXING

The molar excess enthalpies of benzene cyclohexane and benzene tetrachlorome -thane were measured at 298,15K with a flow microcalorimeter of the Picker design (from Setaram, France) operated in the discontinuous mode. Agreement with literature data was within 1 per cent at x=0.5. The performance of the microcalori-meter was proved to be well and the data measured were reliable, in this paper,heats of mixing of cyclohexanone with cyclohexanol were systematically measured at five temperatures 300.15,303. 15,308.15,313.15,and 323.15K.We found that all maximum values of this system at above temperatures are situated at x0.5, and the curves of heats of mixing decline with temperature at 300.15 to 308.15K and slowly rise at 308.15 to 323.15K. In addition, from the experimental data the partial molar heats of mixing at 300. 15K have been calculated using the Redlich and Kister equation. The molar heat capacities for this system at various temperatures are in progress.