Unit Conversions in Pressure: Understanding Atmosphere, Torr, and Pascals

This video tutorial explains how to convert between different units of pressure, such as atm, torr, kilopascals, and psi. It covers the common units used in chemistry and physics, and provides step-by-step examples of converting between these units. The video also discusses how pressure changes with elevation and how to calculate the height of a mercury column in a barometer. Practical examples are provided to help viewers master the topic, which is essential for solving gas law problems.

Which of the following is equivalent to 1 atm?

• 900 millimeters of mercury

• 760 torr

• 101.3 psi

• 500 kilopascals

In chemistry, which unit of pressure is most commonly used?

• Kilopascals

• Psi

• Torr

• Pascals

How many pascals are there in one kilopascal?

• 1000

• 10000

• 100

• 10

What is the first step in converting 725 torr to atm?

• Divide by 101.3

• Multiply by 760

• Identify the conversion factor

• Subtract 14.7

What is the pressure in atm if a gas has a pressure of 725 torr?

• 0.9539 atm

• 1.5 atm

• 0.5 atm

• 1.2 atm

What is the conversion factor between psi and atm?

• 1 atm = 14.7 psi

• 1 atm = 760 psi

• 1 atm = 101.3 psi

• 1 atm = 32 psi

If a tire has a pressure of 32 psi, what is its pressure in atm?

• 2.177 atm

• 3.5 atm

• 1.5 atm

• 0.5 atm

What is the height of the mercury column in a barometer at 0.843 atm?

• 700 mm

• 500 mm

• 760 mm

• 640.68 mm

How do you convert 117 kilopascals to millimeters of mercury?

• Multiply by 101.3 and divide by 760

• Divide by 760 and multiply by 101.3

• Multiply by 760 and divide by 101.3

• Add 760 and subtract 101.3

What happens to air pressure as elevation decreases?

• It increases

• It fluctuates

• It decreases

• It remains constant