Why in case of hydrogen and helium the compressibility factor is always greater than 1?
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It is the matter of fact that due to pV = nRT, the compressibility factor of all ideal gases are equal to 1 as they have strong dipole due to large surface area. But in case of hydrogen and helium, this is false because they are considered as nearly ideal gases.
The attractive forces existing among them is vanderwalls force which is also weak due to less surface area as the size of these atoms are very small. Hence, it can be inferred that case of hydrogen and helium the compressibility factor is always greater than 1.
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Answer:
The compressibility factor of H2 is >1.
Because, they show real gas behavior and occupies more volume than usual.
hope this has help u........
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