Immersional

A. Comparative Immersional Heat Values for Hydrophobic and Hydrophilic Solids. 280... 

A. The Rating of Solid Surfaces by Immersional Heats in Organic Liquids. 284... 

A. Heats of Adsorption from Heat of Immersional Wetting Data.288... 

The number of purposes to which immersional studies can be put is on the increase. The list which follows may suggest other applications ... 

The Boyd and Harkins reference might be considered the first careful calorimetric work taking into account the special problems of immersional calorimetry it was also the first such work in which surface areas could be assessed (the B.E.T. method) as a necessary auxiliary for putting values on a imit area basis temperatiue changes were measured with a 36-junction thermocouple and a White double potentiometer with a sensitive galvanometer. 

Zettlemoyer et al. provided a detailed study of the use of a thermistor connected to a Mueller bridge as the temperature-sensing element in immersional calorimetry. Thermistor calorimeters have since gained wide use because of the simple construction and operation they make possible. Brief... 

The interactions of the acid sites on clay cracking catalysts with water can be studied readily by immersional calorimetry even if chemisorption occurs and yields information concerning the type and energy distribution of these sites as we shall see in Sec. VII,A. 

One of the principal objectives of any immersional calorimetric investigation of organic fibrous materials is to assess the thermodynamic functions... 

Heats of Immersional Welting of Oraphite Samples in Organic Liquids at... 

When water vapor adsorbs only on a portion of a surface, the degree of surface hydrophilicity of a solid can be rated from the ratio of the effective water area to the nitrogen area or by immersional heat values in water. Adsorption measurements were used by Young to follow the conversion of... 

Immersional Heats and the Nature of Solid Surfaces J. J. Chessick and A. C. Zettlemoyer... 

Zettlemoyer, A.C., 1965. Immersional wetting of solid surfaces. Industrial and Engng. Chemistry, 57 27-36. 

In immersional wetting, the solid, which is not originally in contact with the liquid, is immersed completely in the liquid. The area of liquid-gas interface, therefore, remains unchanged. The free energy change for immersion of a solid in a liquid is given by... 

Suppose that the solid is originally not in contact with water but is immersed completely (i.e., immersional wetting). In this case, the water penetrates the capillaries in the solid. The energy change for immersional wetting, called the adhesion tension, is given by ... 

---