Le Chatelier-Brown principle

A further electrokinetic phenomenon is the inverse of the former according to the Le Chatelier-Brown principle if motion occurs under the influence of an electric field, then an electric field must be formed by motion (in the presence of an electrokinetic potential). During the motion of particles bearing an electrical double layer in an electrolyte solution (e.g. as a result of a gravitational or centrifugal field), a potential difference is formed between the top and the bottom of the solution, called the sedimentation potential. 

Besides, let us note the automatic observance (certainly with correctly set initial data) and, hence, needlessness of the formalized descriptions in equilibrium modeling of such important regularities of macroscopic system behavior as the Gibbs phase rule, the Le Chatelier-Brown principle, mass action laws, the Henry law, the Raoult law, etc. 

In accordance with the Le Chatelier-Brown principle (the principle of the least constraint) the V value determining stability of a solid falls within the following range [42] ... 

Our experimental observations indicated that warming a bulb containing N02 and N204 caused a shift of the equilibrium state in favor of the formation of N02 (the reddish-brown color deepened). It is easy to see that this is in accord with Le Chatelier s Principle. A rise in temperature is caused by an input of heat. At the higher... 

These three tubes contain a mixture of N02 g and N204(g). The tube on the left is in an ice-water mixture. The centre tube is at room temperature. The tube on the right is in boiling water. Given that N02 g is brown, can you explain the shift in equilibrium Think about Le Chatelier s principle and the enthalpy of the reaction between the two gases. 

FIGURE 14.12 Le Chatelier s Principle Tlie Effect of a Temperature Change Because the reaction is endothermic, raising the temperature causes a shift to the right, toward the formation of brown NO2. 

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