A NEW TWIN HIGH-TEMPERATURE REACTION CALORIMETER. THE HEATS OF MIXING IN LIQUID SODIUM POTASSIUM NITRATES

被引：139

作者：

Kleppa, O. J. ^{[1
]}

机构：

[1] Univ Chicago, Inst Study Met, Chicago, IL 60680 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1960年 / 64卷 / 12期

关键词：

D O I：

10.1021/j100841a032

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 [物理化学]; 081704 [应用化学];

摘要：

A new sensitive reaction calorimeter for work at temperatures up to 500 degrees has been developed. The calorimeter readily permits detection of heat effects of 0.01 cal., and is suitable for precise measurements of 2 cal. and more. In its first application this apparatus has been used to determine the enthalpy of mixing in liquid sodium nitrate-potassium nitrate mixtures. From the resalts the following relation was derived between the molar integral enthalpy of mixing (Delta H(M)) and the mole fraction of sodium nitrate (X). Delta H(M) = -X(1 - X) (408(.5) + 68X]. Within the experimental error of about one percent, this enthalpy is independent of temperature between 346 and 450 degrees.

引用

页码：1937 / 1940

页数：4

共 6 条

[1]

CALVET E, 1956, MICROCALORIMETRIC

[2]

KELLEY KK, 1949, BUREAU MINES B, P4476

[3]

A CALORIMETRIC INVESTIGATION OF SOME BINARY AND TERNARY LIQUID ALLOYS RICH IN TIN [J].