(ĕ-kwā′zhŏn )

[L. *aequare*, to make equal]

1. The state of being equal.

2. In chemistry, a symbolic representation of a chemical reaction. The equation includes symbols for the involved elements and/or compounds, and their molar ratios. By convention, the input (reactants) are listed on the left, and the products of the reaction are placed on the right.

3. A description of a mathematical relation between two or more constants or variables.

## Arrhenius equation

*SEE: Arrhenius equation*

## equation of motion

A statement of the variables of pressure, volume, compliance, resistance, and flow for respiratory system mechanics.

## Henderson-Hasselbalch equation

## personal equation

A personal bias or peculiarity that may explain a difference in approach or interpretation.

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