The compressibillity of a gas is greater than unity at 1 atm and 273 K. Therefore :

The compressibility of a gas is less than unity at STP .

The compressibility factor of a gas is greater than unity at STP . Therefore

Compressibility factor Z=(PV)/(RT) . Considering ideal gas, real gas, and gases at critical state, answer the following questions: The cpmpressibility factor of a gas is less than unity at STP , therefore

The compressibility factor of gases is less than unity at STP . Therefore,