A constante de equilibrio da isomerizaçāo do butano em...

A constante de equilibrio da isomerizaçāo do butano em isobutano 62.5 , a $25^{\circ} \mathrm{C}$. (Veja o Preblema 30 .) Se 1,75 mol de butano e 1,25 mol de isobutano forem misturados, o sistema estará em equilibrio a $25^{\circ} \mathrm{C}$ ? Se não estiver, que composto terá a concentração aumentada quando o sistema avançar para o equilibrio? Calcule a concentraçäo de cada composto no equillorio.

Key Concepts

Chemical Equilibrium

Chemical equilibrium is the state in which the rates of the forward and reverse reactions are equal, resulting in constant concentrations of reactants and products over time. It is a dynamic balance where, despite the continuous occurrence of the reactions, there is no net change in the system’s composition.

Equilibrium Constant (K)

The equilibrium constant (K) is a numerical value that relates the concentrations of products and reactants at equilibrium for a given reaction at a specific temperature. It provides a measure of the extent of the reaction; a large K indicates that the equilibrium favors the formation of products, whereas a small K favors the reactants.

Reaction Quotient (Q)

The reaction quotient (Q) is calculated using the initial concentrations of reactants and products in the same manner as the equilibrium constant. By comparing Q to K, one can predict the direction in which the reaction will shift to reach equilibrium. If Q is less than K, the reaction will proceed in the forward direction, and if Q is greater than K, it will shift in the reverse direction.

Le Chatelier's Principle

Le Chatelier's Principle states that if a system at equilibrium experiences a change in concentration, temperature, or pressure, the equilibrium will shift to counteract that change and re-establish equilibrium. This principle is used to predict how changes in conditions affect the position of equilibrium in a chemical reaction.

ICE Table Method

The ICE (Initial, Change, Equilibrium) Table Method is a systematic approach used to track the concentrations or moles of reactants and products as a reaction moves towards equilibrium. It helps in organizing initial conditions, the changes that occur during the reaction, and the final equilibrium concentrations by considering the stoichiometry of the reaction.

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