The Gas Laws
Chapter Name : States Of Matter |
Sub Topic Code : 102_11_05_06_03 |
Topic Name : The Gas Laws |
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Sub Topic Name : Gay Lussac's Law ( Pressure Temperature Relationship) |
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Introduction
Gay Lussac’s law states at constant volume, the pressure of a fixed amount of 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, the pressure inside would increase leading to an explosion.
Real Life Question:
Why do car tires deflate in winter?
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 pressure also increases. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Heat a soda can | If you heat a soda can, it would explode as the high temperature would increase the pressure of the gas molecules. |
Real life uses :
Compressed LPG is stored at room temperature.
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 as the pressure increases with temperature. |
What you learn in Theory:
Pressure of a gas is directly proportional to its temperature at constant volume and mass.
What you learn in Practice:
Compressed gases should be kept at normal temperature and should be protected from heat.