Explain the significance of compressibility factor.

Explanation

(a) In case of ideal gas, `PV= nRT` thus 2=1 . In this cse the graph of 2 vs P will be straight line with slope =O and its is parallel to pressure axis. (b) In case of real gas `Pv ne nRT` thus, `Z ne1`
`{:("Case 1", "Case2"),("If" Z lt 1("Negative deviation"), "If" Zgt 1("Positive deviation")),(**"Here" PV lt nRT...(1),**"Here" PV gt nRT...(2)),("Relapce nRT by" PV_("ideal") "in eq."(1), "Replace nRT by" PV_("ideal")"in eq"(2)),(":." PV_("real") lt PV_("ideal")or,":." PV_("real")gt PV_("ideal")or),(**"It means gas is more compressibile than expected from ideal behaviour",**"It means gas 1s less compressibile than expected from ideal behaviour"),(**"Attractive forces", **" Repulsive forces"):}`