5 Questions
What is the most compressible state of matter?
Gases
Which instrument is used for measuring atmospheric pressure?
Barometer
What is the SI unit of pressure?
Pascal (Pa)
What is the standard atmospheric pressure equivalent to in torr?
760 torr
What are the four physical properties of gases mentioned in the text?
Pressure, Volume, Temperature, Amount
Study Notes
- Gases take the shape and volume of their containers, making them compressible and able to mix evenly when confined.
- Gases have much lower densities than liquids and solids.
- Pressure is a physical property of gases, exerted on any surface they come into contact with. The unit of pressure is pascal (Pa), with 1 atm being equal to 101,325 Pa.
- Atmospheric pressure is the force exerted by the column of air at sea level, with standard atmospheric pressure (1 atm) equal to 760 mmHg or 101,325 Pa.
- Barometer is an instrument used to measure atmospheric pressure. Manometers are used to measure gas pressures, such as closed tube manometers and open tube manometers. For example, a reading of 800 mmHg on a manometer would correspond to a pressure of 820 mmHg (800 mmHg + atmospheric pressure).
Test your knowledge about the physical characteristics of gases with this quiz. Learn about the properties of gases, their compressibility, and their behavior in different containers.
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