Question

The compressibility factor (Z) of a gas is less than unity at STP. Therefore,

• A. $V_m<22.4$ litres
• B. $V_m=22.4$ litres
• C. $V_m=44.8$ litres
• D. $V_m$$>$$22.4$ litres

Answer 1

The correct option is A $V_m<22.4$ litres

Given that the compressibility factor , Z < 1

$\frac{(PV{)}_{Observed}}{(PV{)}_{Ideal}}<1$
$\Rightarrow V_{obs}<V_{ideal},V_{obs}<22.4$ litre.

(The Compressiblity factor, $Z=\frac{PV}{nRT}$ for an ideal gas).