Chemistry · States of Matter - Gases, Liquids and Solids
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Which gas shows real behaviour?
- A
8 g O2 at STP occupies a volume of 5.6 liters.
- B
1 g H2 in a 0.5-liter flask exerts a pressure of 24.63 atm at 300 K.
- C
1 mole NH3 at 300 K and 1 atm occupies a volume of 22.4 liters.
- D
5.6 liters of CO2 at STP has a mass of 11 g.
The correct answer is 1 mole NH3 at 300 K and 1 atm occupies a volume of 22.4 liters. Although NH3 occupies the expected volume for an ideal gas, it is a polar molecule that experiences significant intermolecular hydrogen bonding. These interactions cause deviations from ideal gas behavior, making NH3 exhibit real gas characteristics.
In contrast, O2 and CO2 are non-polar and show minimal deviation from ideal behavior under standard conditions. H2, despite the high pressure in the flask, is a small non-polar molecule that generally behaves ideally under normal conditions.
O2 at STP occupies a volume of 5.6 liters, which is typical for an ideal gas. O2 is non-polar and experiences minimal intermolecular interactions, so it does not significantly deviate from ideal gas behavior.
H2 in a 0.5-liter flask at 300 K exerts a pressure of 24.63 atm, which is higher than expected for an ideal gas. However, H2 is a very small and non-polar molecule, typically showing minimal deviation from ideal behavior under normal conditions.
NH3 occupies 22.4 liters, typical for an ideal gas. However, NH3 is a polar molecule with strong intermolecular hydrogen bonds, causing it to deviate from ideal behavior, showing real gas characteristics.
CO2 at STP with a mass of 11 grams follows the ideal gas law. CO2 is non-polar and typically behaves as an ideal gas under standard conditions.
Tagged under Chemistry · States of Matter - Gases, Liquids and Solids · 2013