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Questions and Answers
Questions and Answers
What is the most compressible state of matter?
What is the most compressible state of matter?
- Plasmas
- Solids
- Liquids
- Gases (correct)
Which instrument is used for measuring atmospheric pressure?
Which instrument is used for measuring atmospheric pressure?
- Hygrometer
- Manometer
- Thermometer
- Barometer (correct)
What is the SI unit of pressure?
What is the SI unit of pressure?
- Newton (N)
- Joule (J)
- Pascal (Pa) (correct)
- Torque (Nm)
What is the standard atmospheric pressure equivalent to in torr?
What is the standard atmospheric pressure equivalent to in torr?
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What are the four physical properties of gases mentioned in the text?
What are the four physical properties of gases mentioned in the text?
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Questions and Answers
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Study Notes
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).
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