Resumen de Dissolution Kinetics of Solids: Application with Spherical Candy
This economical and safe kinetics experiment involves the rate of dissolution of a spherical candy in water. The 2/3 order with respect to the measured mass gives students a practical example of a non-integer order usually only encountered in textbooks in free radical processes. Insight is given to the fact that in a dissolving solid sphere, the radius recedes at constant speed. This experiment also may be useful as an introduction to the concepts of solubility and diffusion in a general chemistry course. Temperature dependence on dissolution rate constants revealed an energy of activation of 23 kJ/mol (±1 kJ/mol) for different hard candies.
