Liquefaction Of Gases
Chapter Name : States Of Matter |
Sub Topic Code : 102_11_05_10_01 |
Topic Name : Liquefaction Of Gases |
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Sub Topic Name : Liquefaction Of Gases |
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Introduction
• Critical temperature (Tc) is the temperature above which a gas cannot be liquefied. • Volume of one mole of the gas at critical temperature is called critical volume (Vc). • Pressure at the critical temperature is called critical pressure (Pc). • A gas below the critical temperature can be liquefied by applying pressure, and then it is called vapor of the substance.
Pre-Requisites:
volume, gas, temperature, compression, pressure
Activity:
LPG gas in the cylinders and gases in the fire extinguishers are compressed liquefied gases.
Real Life Question:
How do gases become liquefied?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Critical temperature | Critical temperature (Tc) is the temperature above which a gas cannot be liquefied. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|
Real life uses :
LPG gas for cooking, LNG gas
Places to visit :
kitchen
Practical examples around us
| Examples | Explainations |
|---|---|
| Liquefied gases | Liquefied gases in the cylinder and fire extinguishers are used in every household. |
What you learn in Theory:
Gases are liquefied when they are cooled and compressed. Cooling slows their motion and compression brings the particles close together.
What you learn in Practice:
Gases need to be brought to their critical temperature to be liquefied.