What is homogeneous/heterogeneous equilibrium?

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wannam | High School Teacher | (Level 3) Educator

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First, let's break down the words so it will be easier to remember.  Equilibrium means that things are in a state of balance.  Homo is a Greek prefix that means same, and hetero is a Greek prefix that means different.  A homogeneous equilibrium is where everything in the reaction reaching a balance is in the same phase.  An example would be when everything in the reaction is in the gaseous phase.  A heterogeneous equilibrium is where the reaction is balanced but the agents of that reaction are in different phases.  An example would be a reaction between a gas and a solid.  See the links below for more details.  The chemguide link also contains equation examples in case you need them.