Types of Equilibrium

Types of Equilibrium

The equilibrium between different chemical species present in the same or different phases is called chemical equilibrium. There are two types of chemical equilibrium.
Homogeneous equilibrium: The equilibrium reactions in which all the reactants and the products are in the same phase are called homogeneous equilibrium reactions.
   
(2) Heterogeneous equilibrium: The equilibrium reactions in which the reactants and the products are present in different phases are called heterogeneous equilibrium reactions.
   
Relationship between equilibrium constant and ΔG°
ΔG for a reaction under any condition is related with ΔG° by the relation,  
  ΔG = ΔG° + 2.303 RTlog Q 
Standard free energy change of a reaction and its equilibrium constant are related to each other at temperature T by the relation ΔG = 2.303 RT log K,  
For a general reaction a = 1.
For gases: a = pressure of gas in atm.
For components in solution: a = molar concentration.  

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