Homework Answers
The compressibility factor (Z), , is a correction factor which describes the deviation of a real gas from ideal gas behavior. It is the ratio of the molar volume of a gas to the molar volume of an ideal gas at the same temperature and pressure. For an ideal gas the compressibility factor Z =1
At 200 K volume of 1 mole of Xe = 25 dm3 (25 L)
Volume of Xe as an ideal gas =22 dm3
Compressibility factor z = Vreal / Videal = 25 dm3 /22 dm3 = 1.136
As z> 1, the gas is said to show positive deviation. ie, less compressible than expected from ideal behaviour.
This is due to strong repulsive forces among the molecules
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