The Gas Laws
Chapter Name : States Of Matter |
Sub Topic Code : 102_11_05_06_04 |
Topic Name : The Gas Laws |
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Sub Topic Name : Avogadro's Law (Volume - Amount Relationship) |
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Introduction
• Avogadro’s law states that equal volumes of all gases under the same conditions of temperature and pressure contain equal number of molecules. • An ideal gas is one which obeys Boyle’s law, Charles law and Avogadro’s law
Pre-Requisites:
pressure, volume, gas, temperature
Activity:
Compressed gas cylinders have a high density of gas in them. They are handled with care therefore, as compression is only possible at specific temperature and high pressure.
Real Life Question:
Would a larger balloon of gas have more gas or a small balloon?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Avogadro’s law | Avogadro’s law states that equal volumes of all gases under the same conditions of temperature and pressure contain equal number of molecules. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Balloon | Blow some gas in it, if you blow more gas in it you would keep on increasing the amount of gas in it. If you release some gas, the number of moles of gas in it would reduce. |
Real life uses :
Filling gas in tires.
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:
Volume of a gas is directly proportional to the number of moles and equal volumes of a gas at STP would have the same number of molecules.
What you learn in Practice:
To have a increase amount of gas the volume needs to be increase if pressure and temperature are constant.