Final answer:
The compressibility factor (Z) represents the deviation from ideal gas behavior.
Step-by-step explanation:
The compressibility factor (Z) is a measure of how closely a gas behaves like an ideal gas. It represents the deviation from ideal gas behavior. An ideal gas has a compressibility factor of 1, meaning its behavior perfectly follows the predictions of the ideal gas law, PV = nRT. Any deviation from 1 indicates non-ideal behavior.