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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0:50 minutes

Problem 7d

Textbook Question

A tank contains oxygen (O₂) at a pressure of 2.00 atm. What is the pressure in the tank in terms of the following units?
d. kPa

Verified step by step guidance

Identify the relationship between atm (atmospheres) and kPa (kilopascals). The conversion factor is 1 atm = 101.325 kPa.

Write the conversion equation: Pressure in kPa = Pressure in atm × Conversion factor.

Substitute the given pressure in atm (2.00 atm) into the equation. This gives: Pressure in kPa = 2.00 atm × 101.325 kPa/atm.

Perform the multiplication to calculate the pressure in kPa. Ensure that the units of atm cancel out, leaving the result in kPa.

Verify the result for significant figures. Since the given pressure (2.00 atm) has 3 significant figures, the final answer should also be reported with 3 significant figures.

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Key Concepts

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

Pressure Units

Pressure is a measure of force applied per unit area, and it can be expressed in various units, including atmospheres (atm), kilopascals (kPa), and others. Understanding how to convert between these units is essential for solving problems related to gas behavior and properties.

Conversion Factor

To convert pressure from one unit to another, a conversion factor is used. For example, 1 atm is equivalent to 101.325 kPa. Knowing this conversion factor allows for accurate calculations when changing pressure measurements from atm to kPa.

Ideal Gas Law

The Ideal Gas Law (PV=nRT) relates pressure (P), volume (V), temperature (T), and the number of moles (n) of a gas. While not directly needed for the conversion in this question, understanding this law provides context for why pressure measurements are important in gas-related calculations.

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Textbook Question

In 1783, Jacques Charles launched his first balloon filled with hydrogen gas, which he chose because it was lighter than air. If the balloon had a volume of 31 000 L, how many kilograms of hydrogen were needed to fill the balloon at STP?

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