Chemical Equilibrium
The state in which forward and reverse reaction rates are equal with no net change.
Definition
Chemical equilibrium is the state of a reversible chemical reaction at which the rate of the forward reaction equals the rate of the reverse reaction, resulting in no net change in the concentrations of reactants and products over time. The position of equilibrium is described by the equilibrium constant (K) and can be shifted by changes in concentration, temperature, or pressure, as described by Le Chatelier's Principle.
Example
“In the industrial Haber process for making ammonia, nitrogen and hydrogen gases reach equilibrium with ammonia; engineers adjust temperature and pressure to maximize ammonia production according to Le Chatelier's Principle.”
Usage Examples
- 1
“The team applied chemical equilibrium best practices to improve their chemistry outcomes significantly.”
- 2
“Understanding chemical equilibrium is essential for anyone building a career in STEM.”
When & How to Use
Use 'Chemical Equilibrium' when working in Chemistry contexts where chemical equilibrium is the state of a reversible chemical reaction at which the rate of the forward reaction equals the rate of the reverse reaction, resulting in no net change in the concentrations of reactants and products over time.
- ▸Applying chemical equilibrium principles during a chemistry project or initiative
- ▸Explaining chemical equilibrium to a junior team member or stakeholder unfamiliar with STEM
- ▸Evaluating options or proposals using chemical equilibrium as a decision-making criterion
Etymology & Origin
The term 'Chemical Equilibrium' derives from Greek roots and entered STEM professional usage as the field formalised in the 20th century.
History & Evolution
The concept of chemical equilibrium has evolved alongside STEM. Early practitioners relied on informal methods; structured approaches emerged with the professionalisation of chemistry in the mid-20th century. Today, chemical equilibrium is a standard part of STEM practice globally.
Synonyms
- dynamic equilibrium
- reversible equilibrium
- chemical balance
Antonyms / Opposites
- irreversible reaction
- completion
Images
CC-licensed · free to useVideo
Related Terms
- Le Chatelier's Principle
- Equilibrium Constant
- Reversible Reaction
- Reaction Rate