Gas Liquefaction Explained: High Pressure Effect
Liquefaction is the process where a gas changes into a liquid.
How Pressure Causes Gas Liquefaction
Gases naturally have molecules that are far apart.
Applying high pressure forces these molecules closer together. This action significantly reduces the space between particles.
As the distance between molecules decreases, the intermolecular attractive forces become more significant.
When these attractive forces overcome the molecules' kinetic energy, the gas undergoes a phase change and liquefies.
Key Takeaway
The primary reason gases liquefy under high pressure is the reduction in intermolecular space, enabling attractive forces to dominate.
Important Questions from States of Matter
A liquid is heated up to a certain temperature. Which one of the following situation would correspond to the boiling of the liquid?
Which one among the following oxides has the highest melting point?
Equal volume of all gases, when measured at the same temperature and pressure, contain an equal number of particles. Who proposed the above law?
Match List I with List II and select the correct answer using the code given below the Lists:
Code:List I (Noble gas)
List II (Use)
A. Argon
1. In lights for advertising display
B. Neon
2. Airport landing lights and in light houses
C. Krypton
3. Light in photographer’s flash gun
D. Xenon
4. In tungsten filament to last
Match List-I with List-II and select the correct answer using the code given below the Lists:
List I
(Process)
List II
(Type of change)
A. Heating of camphor
1. Chemical
B. Cooling of water vapor up to room temperature
2. Evaporation
C. Cooking an egg
3. Condensation
D. Formation of water vapor at room temperature.
4. Sublimation
