When Compressibility Factor Is Greater Than 1?

When the intermolecular repulsive forces are strong then the actual volume of the gas

volume of the gas
The specific volume, an intensive property, is the system's volume per unit of mass. Volume is a function of state and is interdependent with other thermodynamic properties such as pressure and temperature. For example, volume is related to the pressure and temperature of an ideal gas by the ideal gas law.
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will be more than the volume of an ideal gas. The gas will have a compressibility factor greater than one.

Under what conditions the compressibility factor Z for a gas is greater than 1?

For real gases, when the pressure is high, the value of Z will be greater than 1 i.e., Z > 1. And when the pressure is very low, the value of Z will be less than 1 i.e., Z < 1. And at intermediate pressures, the value of Z will be equal to 1 i.e., Z = 1.

What if compressibility factor is less than 1?

The compressibility factor (Z) of real gas is usually less than 1 at low temperature and low pressure because. Z<1 means attraction forces are dominating ⇒a is considerable, b can be negligible at low temperature and low pressure.

Alexander Ross

Alexander Ross

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Alexander Ross has covered the video game industry for a decade, writing deep dives on game design, esports tournaments, VR developments, and gaming culture.