The Gas Laws
Chapter Name : States Of Matter |
Sub Topic Code : 102_11_05_06_02 |
Topic Name : The Gas Laws |
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Sub Topic Name : Charle's Law (Temperature-Volume Relationship) |
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Introduction
Charles’ Law states that at constant pressure, the volume a fixed amount of an ideal gas is directly proportional to its temperature.
Pre-Requisites:
pressure, volume, gas, temperature
Activity:
LPG and CNG cylinders are kept at room temperatures to avoid an explosion in case they catch fire.
Real Life Question:
Why does a hot air balloon rise?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Gas | Gas is the simplest state of matter. It is highly compressible and least dense. When temperature of a gas increases, its volume also increases. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Fully inflated balloon | If you would put a fully inflated balloon into a microwave and heat it, it would explode as the volume of the air inside the ball would increase when heat is supplied. |
Real life uses :
Hot air balloon
Places to visit :
Kitchen, gas station
Practical examples around us
| Examples | Explainations |
|---|---|
| CNG cylinder | Gas cylinder is compressed and stored as LPG for cooking or CNG for car at room temperature. At high temperature there is a danger of the cylinder exploding. |
What you learn in Theory:
Volume of a gas is directly proportional to its temperature at constant pressure and mass.
What you learn in Practice:
Compressed gases should be kept at normal temperature and should be protected from heat.