equation of state

noun Physics.
an equation relating the temperature, pressure, and volume of a given thermodynamic system.
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World English Dictionary
equation of state
any equation that expresses the relationship between the temperature, pressure, and volume of a substance

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Example sentences
The only form of matter in this universe that has this type of equation of state is quantum vacuum energy.
Only with an accurate equation of state can the full hydrodynamics of the phase transition be modeled.
As a result, the equation of state of the mixture was obtained.
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