The compressibility factor Z=PV/RT for 1 mol of a real gas is greater than unity at a pressure of 1 atm and 273.15 K. The molar volume of the gas at STP will be :
Correct answer: B. Greater than 22.4L
- A. Less than 22.4L
- B. Greater than 22.4L
- C. Equal to 22.4L
- D. None of these
Explanation
The compressibility factor Z=PV/RT. If Z > 1, it means the real volume is greater than the ideal volume. Since the ideal molar volume at STP is 22.4 L, the molar volume of this gas will be greater than 22.4 L.
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Gas behaviour is explained through the kinetic molecular theory and the relationships among pressure, volume and temperature. Work includes STP, Boyle's and Charles's laws, absolute zero, the ideal gas equation, and the distinction between ideal and real gases, especially the effects of intermolecular forces and molecular volume.
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