LPG Storage Explained

Liquefied Petroleum Gas (LPG) needs to be stored in cylinders efficiently. LPG is naturally a gas at normal atmospheric conditions.

Why LPG is Stored as Liquid

To store a large amount of LPG in a compact space, like a gas cylinder, it must be converted into a liquid state. This conversion allows for a significant volume reduction compared to storing it as a gas.

The Process of Liquefaction

LPG is liquefied through a combination of two physical processes:

• Cooling: Reducing the temperature of the LPG lowers the energy of its molecules, making them easier to pack together.
• Compression: Applying high pressure forces the gas molecules closer, further decreasing the volume and aiding the transition to a liquid state.

The specific conditions involve cooling and compressing the gas under high pressure, effectively increasing its density.

Evaluating Other Options

• Option 1: LPG does not react with air to become liquid.
• Option 3: LPG is typically liquefied, not solidified, for storage in cylinders. Solidification requires much lower temperatures.
• Option 4: Heating and low pressure would keep LPG in its gaseous state or cause it to vaporize, which is the opposite of what's needed for storage.

Conclusion on LPG Storage

Therefore, LPG is stored in cylinders in liquid form because it is cooled and compressed under high pressure, making storage practical and safe.