Crystal dissolution mixed control

Fig. 2.3 Rate-limiting steps in mineral dissolution (a) transport-controlled, (b) surface reaction-controlled, and (c) mixed transport and surface reaction control. Concentration (C) versus distance (r) from a crystal surface for three rate-controUing processes, where is the saturation concentration and is the concentration in an infinitely diluted solution. Reprinted from Sparks DL (1988) Kinetics of soil chemical processes. Academic Press New York 210 pp. Copyright 2005 with permission of Elsevier...

Microcalorimetry is used to monitor thermal changes associated with physical and/or chemical events that do not require heating or cooling for their initiation. Such events include dissolution, precipitation, reaction, and crystallization. In a typical microcalorimetry experiment, these events are triggered in a controlled manner by mixing two preequilibrated and... 

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