ideal gas law

noun Physics.
the law that the product of the pressure and the volume of one gram molecule of an ideal gas is equal to the product of the absolute temperature of the gas and the universal gas constant.
Also called gas law. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Science Dictionary
ideal gas law  
A law that describes the relationships between measurable properties of an ideal gas. The law states that P × V = n × (R) × T, where P is pressure, V is volume, n is the number of moles of molecules, T is the absolute temperature, and R is the gas constant (8.314 joules per degree Kelvin or 1.985 calories per degree Celsius). A consequence of this law is that, under constant pressure and temperature conditions, the volume of a gas depends solely on the number of moles of its molecules, not on the type of gas. Also called universal gas law. See also Boyle's law, Charles's law, van der Waals equation.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Use the ideal gas law to determine gas volumes at different absolute
  temperatures and absolute pressures.
Introducing units of time to the ideal gas law shows the relationship between
  volumetric and molar flow rates.
The ideal gas law will dictate pressure, temperature, and volumes dependant on
  one another.
The relationship is derived hydrostatic relationship, the ideal gas law and the
  geostrophic relationship.
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