Compressibility Factor Calculator
Calculate Z = PV/(nRT). Z = 1 for ideal gas. Deviation indicates real gas behavior.
This tool is for informational and educational purposes only. It is not a substitute for professional financial, medical, legal, or engineering advice. See Terms of Service.
Can't find what you need?
Request a ToolHow to Use the Compressibility Factor Calculator
Enter the pressure, volume, moles, and temperature of a gas sample. The calculator computes Z = PV/(nRT). Values near 1 indicate ideal behavior. Significant deviation from 1 indicates the gas is behaving non-ideally.
About the Compressibility Factor Calculator
The compressibility factor Z quantifies how much a real gas deviates from ideal gas behavior. Defined as Z = PV/(nRT), it equals 1 for a perfect ideal gas. At high pressures or low temperatures, real gases deviate from ideality due to intermolecular forces and finite molecular volume.
Frequently Asked Questions
What does Z = 1 mean?
Z = 1 means the gas behaves ideally. The actual PV product equals nRT exactly. Real gases approach Z = 1 at low pressures and high temperatures, where molecular interactions are negligible.
What does Z < 1 indicate?
Z < 1 means attractive intermolecular forces dominate. The gas occupies less volume than predicted by the ideal gas law. This typically occurs at moderate pressures where molecules are close enough to attract each other.
What does Z > 1 indicate?
Z > 1 means repulsive forces dominate. The gas occupies more volume than predicted. This occurs at very high pressures where molecules are so close that their electron clouds repel each other.