For gas, the compressibility factor, Z = PV/n RT is: — States of Matter and Gaseous State Chemistry Question

💡 Solution & Explanation

For hydrogen and helium, the compressibility factor Z is always greater than 1 and increases with increase in pressure. This is because hydrogen and helium being very small, the intermolecular forces of attraction in them are negligible i.e ‘a’ is very small so that 2 a V is negligible. Thus, Van der Waal’s equation, therefore, become Gaseous State 22 1 1 1 PV RT Pb PV Pb RT RT Pb Z RT Z >> >> >>