Chemistry · States of Matter - Gases, Liquids and Solids
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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 :
- A
Less than 22.4L
- B
Greater than 22.4L
- C
Equal to 22.4L
- D
None of these
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.
This option is incorrect. If the compressibility factor Z is greater than 1, it indicates that the gas is behaving less ideally, and the molar volume will be greater, not less, than 22.4L.
This option is correct. A compressibility factor Z greater than 1 suggests that the gas occupies more volume than an ideal gas under the same conditions, so the molar volume at STP will be greater than 22.4L.
This option is incorrect. An ideal gas at STP has a molar volume of 22.4L, but if Z is greater than 1, the real gas's molar volume will be greater than 22.4L.
This option is incorrect because there is a correct answer among the provided options: the molar volume is greater than 22.4L.
Tagged under Chemistry · States of Matter - Gases, Liquids and Solids