Thermal Expansion Magnitude of Expansion of Solids, Liquids and Gases Examples of Expansion...
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Transcript of Thermal Expansion Magnitude of Expansion of Solids, Liquids and Gases Examples of Expansion...
![Page 1: Thermal Expansion Magnitude of Expansion of Solids, Liquids and Gases Examples of Expansion Relationship between pressure and volume at a constant temperature.](https://reader035.fdocuments.in/reader035/viewer/2022062308/56649eb05503460f94bb5da8/html5/thumbnails/1.jpg)
Thermal Expansion
Magnitude of Expansion of Solids, Liquids and Gases
Examples of Expansion
Relationship between pressure and volume at a constant temperature
![Page 2: Thermal Expansion Magnitude of Expansion of Solids, Liquids and Gases Examples of Expansion Relationship between pressure and volume at a constant temperature.](https://reader035.fdocuments.in/reader035/viewer/2022062308/56649eb05503460f94bb5da8/html5/thumbnails/2.jpg)
Thermal Expansion
• When molecules are heated they move far apart from each other– This causes the material to expand
• Expansion– Increase in size of a material due to
added heat • When molecules are cooled, the
molecules, move closer to each other– This causes the material to contract
• Contraction– Decrease in size of a material due to
heat removed
![Page 3: Thermal Expansion Magnitude of Expansion of Solids, Liquids and Gases Examples of Expansion Relationship between pressure and volume at a constant temperature.](https://reader035.fdocuments.in/reader035/viewer/2022062308/56649eb05503460f94bb5da8/html5/thumbnails/3.jpg)
Let us look at 3 videos on the example of expansion and contraction
![Page 4: Thermal Expansion Magnitude of Expansion of Solids, Liquids and Gases Examples of Expansion Relationship between pressure and volume at a constant temperature.](https://reader035.fdocuments.in/reader035/viewer/2022062308/56649eb05503460f94bb5da8/html5/thumbnails/4.jpg)
Applications of Thermal Expansion
Bimetallic strip as thermometer
![Page 5: Thermal Expansion Magnitude of Expansion of Solids, Liquids and Gases Examples of Expansion Relationship between pressure and volume at a constant temperature.](https://reader035.fdocuments.in/reader035/viewer/2022062308/56649eb05503460f94bb5da8/html5/thumbnails/5.jpg)
Applications of Thermal Expansion
Liquid Expansion as thermometer
Road expansion gaps
![Page 6: Thermal Expansion Magnitude of Expansion of Solids, Liquids and Gases Examples of Expansion Relationship between pressure and volume at a constant temperature.](https://reader035.fdocuments.in/reader035/viewer/2022062308/56649eb05503460f94bb5da8/html5/thumbnails/6.jpg)
Applications of Thermal Expansion
Tyre Fitting
![Page 7: Thermal Expansion Magnitude of Expansion of Solids, Liquids and Gases Examples of Expansion Relationship between pressure and volume at a constant temperature.](https://reader035.fdocuments.in/reader035/viewer/2022062308/56649eb05503460f94bb5da8/html5/thumbnails/7.jpg)
Thermal Expansion
• All materials expand– Solids have linear expansion
• Varies among materials– Liquids and Gases have volume
expansion• Varies among materials
• Gases expands more readily than gas
• When a materials changes from solid to liquid, volume does not change much
• When a liquid changes to gas, the volume expansion is about 1000 times more
![Page 8: Thermal Expansion Magnitude of Expansion of Solids, Liquids and Gases Examples of Expansion Relationship between pressure and volume at a constant temperature.](https://reader035.fdocuments.in/reader035/viewer/2022062308/56649eb05503460f94bb5da8/html5/thumbnails/8.jpg)
Pressure of a Gas
• Pressure of a gas– Force per unit area– Force is due to collisions with the walls of the
container– Units: Nm-2 or pascal, Pa
![Page 9: Thermal Expansion Magnitude of Expansion of Solids, Liquids and Gases Examples of Expansion Relationship between pressure and volume at a constant temperature.](https://reader035.fdocuments.in/reader035/viewer/2022062308/56649eb05503460f94bb5da8/html5/thumbnails/9.jpg)
Pressure and Volume of a Gas at Constant Temperature
• At constant temperature, what happens to the volume of the gas when the pressure increases?
• At constant temperature, what happens to the pressure of the gas when the volume decreases?
• Boyle’s LawPα1/VpV = constantp1V1=p2V2