Question

Which of the following gases will deviate most from ideal behavior at high pressure?

• A. Hydrogen
• B. Helium
• C. Carbon dioxide
• D. Neon

Hint:

At high pressures, gases with stronger intermolecular forces and larger molecular sizes show more deviation from ideal behavior. Polar or easily polarizable gases like \( \text{CO}_2 \) deviate more than light, monoatomic gases like He or Ne.

Answer 1

The Correct Option is C

Step 1: Understanding deviation from ideal behavior.
Gases deviate from ideal behavior due to intermolecular forces and the volume occupied by the gas molecules. At high pressure, these deviations become more significant.
Step 2: Analyze intermolecular forces.
Hydrogen and Helium are light and exhibit very weak intermolecular forces.
Neon, a noble gas, also has weak van der Waals forces.
Carbon dioxide, being a larger and more polarizable molecule, has stronger intermolecular attractions, leading to greater deviation.
Step 3: Conclusion.
At high pressure, Carbon dioxide deviates the most from ideal gas behavior due to its significant van der Waals forces and molecular size.