Ideal Gas Equation of State

The ideal gas equation of state (IGEOS) is a mathematical expression that relates the pressure (P), volume (V), and temperature (T) of an ideal gas. It is given by the equation PV = nRT, where n is the number of moles of gas and R is the universal gas constant.

Here are some questions and answers about the IGEOS:

• What is the ideal gas equation of state?
• What is an equation of state?
• Why are equations of state useful?
• What gases obey the IGEOS?
• How does the IGEOS change as the gas pressure is reduced?

Here are the answers to the questions above:

• The ideal gas equation of state is PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, and R is the universal gas constant.
• An equation of state is a mathematical expression that relates the pressure, volume, and temperature of a substance.
• Equations of state are useful because they allow us to calculate one property of a substance given the values of the other two properties.
• Most gases obey the IGEOS approximately under normal lab conditions.
• As the gas pressure is reduced, the IGEOS becomes a better approximation of the actual behavior of the gas.