Gases are different from solids and liquids. In a sample of gas, the molecules are far apart. The gas molecules also move around and collide with each other as well as with the walls of the container. These collisions generate pressure. The pressure of a gas can be measured in different units. One convenient unit of measure is called the atmosphere (atm) because it is based on atmospheric pressure. At sea level. the average pressure is 1 atm. As you get higher in altitude, the pressure steadily drops until you leave the atmosphere, where the pressure is very close to 0 atm The table below shows the different commonly used units of measuring gas pressure. Use this table in the pressure unit conversions Unt Abbreviation 1 atm equivalent atmosphere millimeters of mercury mmilig torr in Hp b/in. Pa inches of mercury pounds per square inch (p) pascal atm 1.00 atm (exact) 760 mmil 760 toer 29.9 in. He 14.7 lb/in 101,325 Pa Part A Part A Convert 1.20 atm of pressure to its equivalent in millimeters of mercury Express the pressure numerically in millimeters of mercury View Available Hint) 1.20 atm 912 mmllg ✔Correct Units of tor are equivalent to units of millimeters of mercury. Both are commonly used for measuring atmospheric pressure. Part B Previewers The pressure in carfres is often measured in pounds per square inch (b/in.), with the recommended pressure being in the range of 25 to 45 lb/in.. Suppose a fire has a pressure of 29.5b/in.. Convert 29.5 lb/in. to its equivalent in atmospheres View All 295/ Submit VOADO ▾ Part C High pressure liquid chromatography (HPLC) is a method used in chemistry and biochemistry to purity chemical substances. The pressures used in this procedure range from around 500 kilopascals (500,000 Pa) to about 60,000 kPa (60,000,000 Pa). It is often convenient to know the pressure in for an HPLC procedure is running at a pressure of 3.2010 Pa, what is its running pressure into? View Avalable
Gases are different from solids and liquids. In a sample of gas, the molecules are far apart. The gas molecules also move around and collide with each other as well as with the walls of the container. These collisions generate pressure. The pressure of a gas can be measured in different units. One convenient unit of measure is called the atmosphere (atm) because it is based on atmospheric pressure. At sea level. the average pressure is 1 atm. As you get higher in altitude, the pressure steadily drops until you leave the atmosphere, where the pressure is very close to 0 atm The table below shows the different commonly used units of measuring gas pressure. Use this table in the pressure unit conversions Unt Abbreviation 1 atm equivalent atmosphere millimeters of mercury mmilig torr in Hp b/in. Pa inches of mercury pounds per square inch (p) pascal atm 1.00 atm (exact) 760 mmil 760 toer 29.9 in. He 14.7 lb/in 101,325 Pa Part A Part A Convert 1.20 atm of pressure to its equivalent in millimeters of mercury Express the pressure numerically in millimeters of mercury View Available Hint) 1.20 atm 912 mmllg ✔Correct Units of tor are equivalent to units of millimeters of mercury. Both are commonly used for measuring atmospheric pressure. Part B Previewers The pressure in carfres is often measured in pounds per square inch (b/in.), with the recommended pressure being in the range of 25 to 45 lb/in.. Suppose a fire has a pressure of 29.5b/in.. Convert 29.5 lb/in. to its equivalent in atmospheres View All 295/ Submit VOADO ▾ Part C High pressure liquid chromatography (HPLC) is a method used in chemistry and biochemistry to purity chemical substances. The pressures used in this procedure range from around 500 kilopascals (500,000 Pa) to about 60,000 kPa (60,000,000 Pa). It is often convenient to know the pressure in for an HPLC procedure is running at a pressure of 3.2010 Pa, what is its running pressure into? View Avalable
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:**Understanding Pressure Units and Conversion**
**Introduction to Gases and Pressure:**
Gases are different from solids and liquids. In gases, the molecules are far apart, constantly moving, and colliding with the walls of their container. These collisions create pressure. Atmospheric pressure affects us daily, such as when we drink juice with a straw, where juice flows up due to the pressure difference. At sea level, atmospheric pressure is about 29.9 inches of mercury, but it can be less on a mountain or more under the sea.
**Common Pressure Units:**
The table below shows different units for measuring gas pressure, which are often used for conversions:
| Unit Name | Abbreviation | 1 atm equivalent |
|--------------------|--------------|------------------------------|
| atmosphere | atm | 1.00 atm (exact) |
| millimeters of mercury | mm Hg | 760 mm Hg |
| torr | torr | 760 torr |
| inches of mercury | in. Hg | 29.9 in. Hg |
| pounds per square inch | lb/in² | 14.7 lb/in² |
| pascal | Pa | 101,325 Pa |
**Task for Understanding Conversions:**
**Part A: Converting Pressure to Millimeters of Mercury**
Task: Convert 1.20 atm to millimeters of mercury.
- Input: 1.20 atm
- Output: 912 mm Hg
- Explanation: Units of atmosphere are equivalent to units of millimeters of mercury, both used for atmospheric pressure.
**Part B: Tire Pressure in Different Units**
Scenario: Tire pressure often measured in pounds per square inch (psi), with a range of 25 to 45 psi.
Task: Suppose a tire has 29.5 psi; convert this to atmospheres.
- Input: 29.5 lb/in²
- Approach: Use conversion formula specific to psi and atm.
- Output: Blank field for user input.
**Part C: Pressure in High-Pressure Liquid Chromatography (HPLC)**
Context: HPLC is used to purify chemical substances, with pressures ranging from 500 kPa (kilopascals) to about 60,000 kPa (60,000,000 Pa).
Task: Convert a pressure of 3.20 x 10⁷ Pa to torr.
- Input: 3.20
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