Compressibility factor of a gas is less than unity at STP. Predict its molar volume.

Compressibility factor of a gas is less than unity at STP. Then predict the molar volume of the gas.

The compressibility factor of an ideal gas is

Compressibility factor for H2 behaving as real gas is

Compressibility factor (Z = (PV)/(nRT)) is plotted against pressure. What is the order of liquefiability of the gas,

Write the compressibility factor interms of molar volumes. What is its significance?

The compression factor (compressibility factor) for one mole of a van der Waals gas at 0°C and 100 atmospheric pressure is found to be 0.5. Assuming that the volume of a gas molecule is negligible, calculate the van der Waals constant a.

At a particular temperature and pressure for a real gas Van der Waal's equation can be written as: (P + a/(V^(2)m)) (V_(m) -b) =RT where Vm is molar volume of gas. This is cubic equation in the variable Vm and therefore for any single value of P & T there should be 3 values of Vm. Which are shown in graph as Q, M and L. As temperature is made to increase at a certain higher temperature the three values of Vm becomes identical. The temperature, pressure & molar volume at point X are called Tc, Pc & Vc for real gas. The compressibility factor in terms of Pc, Vc and T is called Zc. The value of critical compressibility factor Zc is approximately

Derive the value of molar gas constant from gram molar volume.