Web Results


In a chemical reaction, chemical equilibrium is the state in which both reactants and products are present in concentrations which have no further tendency to change with time, so that there is no observable change in the properties of the system. Usually, this state results when the forward reaction proceeds at the same rate as the reverse reaction. ...


An equilibrium constant expression includes terms only for reactants and products whose concentrations and/or partial pressures CHANGE during a chemical reaction. If an equilibrium system is subjected to a change in temperature, pressure, or concentration of a reacting species, the system will respond with a new equilibrium state.


Closed system. A closed system is one in which only energy can move into and out of the system. Matter cannot be gained by the system nor lost from the system. In a closed system it is possible for reactions to be reversible, such as in the demonstration above. In a closed system, it is also possible for a chemical reaction to reach equilibrium.. Reversible reactions (ESCNG)


The concentrations of all chemical species present in a system at dynamic equilibrium remain constant as long as the reaction conditions are unchanged. 5. A catalyst can be used to alter the time required to reach the equilibrium however it does not change the yield of the reaction because the addition of catalyst increase both the forward and ...


Chemical equilibrium is the condition which occurs when the concentration of reactants and products participating in a chemical reaction exhibit no net change over time. Chemical equilibrium may also be called a "steady state reaction." This does not mean the chemical reaction has necessarily stopped occurring, but that the consumption and formation of substances have reached a balanced ...


1) The system is at chemical equilibrium 2) The forward and reverse reactions are so slow that the system moves toward equilibrium at an undetectable rate. The special ratio of products to reactants defined by the equilibrium expression is constant for a given reaction system at a given temperature, but the equilibrium concentrations


Learn A system at chemical equilibrium with free interactive flashcards. Choose from 500 different sets of A system at chemical equilibrium flashcards on Quizlet.


Chemical equilibrium is the state of a system in which the rate of the forward reaction is equal to the rate of the reverse reaction. Figure 8.2.1: Equilibrium in reaction: \(\ce{H_2} \left( g \right) + \ce{I_2} \left( g \right) \rightleftharpoons 2 \ce{HI} \left( g \right)\).


This is the point at which the system has reached chemical equilibrium. While there are various factors that can increase or decrease the amount of time it takes for a given system to reach equilibrium, the equilibrium position itself is unaffected by these factors. For instance, if a catalyst is added to the system, the reaction will proceed ...


Chemical equilibrium. occurs when a reaction and its reverse reaction proceed at the same rate. forward, reverse. ... In an equilibrium system if we increase the conc. of either reactant or product the system reacts in a way that the excess of the concentration is eliminated by either increasing the conc. on the.