Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

8. Gases, Liquids and Solids

Pressure Units

GOB Chemistry

8. Gases, Liquids and Solids

Pressure Units

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0:33 minutes

Problem 39

Textbook Question

List four common units for measuring pressure.

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Understand that pressure is defined as force per unit area, and it is commonly measured using different units depending on the context or system of measurement.

The first common unit of pressure is the Pascal (Pa), which is the SI unit. It is defined as 1 Newton per square meter (1 N/m²).

The second common unit is the atmosphere (atm), which is based on the average atmospheric pressure at sea level. 1 atm is equivalent to 101,325 Pa.

The third common unit is millimeters of mercury (mmHg), often used in medical and laboratory settings. It is based on the height of a mercury column that pressure can support. 1 atm is equivalent to 760 mmHg.

The fourth common unit is pounds per square inch (psi), which is commonly used in the United States for engineering and tire pressure. 1 atm is approximately equal to 14.7 psi.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Pressure

Pressure is defined as the force exerted per unit area on a surface. It is a fundamental concept in physics and engineering, often measured in various units depending on the context, such as in fluids, gases, or solids. Understanding pressure is crucial for applications in meteorology, hydraulics, and aerodynamics.

Common Units of Pressure

There are several standard units used to measure pressure, including pascals (Pa), atmospheres (atm), bar, and millimeters of mercury (mmHg). Each unit serves specific applications; for instance, pascals are commonly used in scientific contexts, while mmHg is often used in medical settings to measure blood pressure.

Conversion Between Pressure Units

Understanding how to convert between different units of pressure is essential for accurate measurements and comparisons. For example, 1 atm is equivalent to 101,325 Pa, and 1 bar is approximately equal to 0.9869 atm. Familiarity with these conversions allows for effective communication and application of pressure data across various fields.

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