Understanding the Ideal Gas Law

The video tutorial explains the ideal gas law, PV=nRT, where R is the gas constant with a value of 0.0821. It discusses the importance of consistent units for pressure, volume, and temperature. The tutorial demonstrates solving for moles of gas by rearranging the equation and provides a detailed example problem, including unit conversions and calculations.

What is the value of the gas constant R in the Ideal Gas Law?

• 0.0821

• 1.00

• 0.622

• 8.314

In what unit must pressure be measured when using the Ideal Gas Law?

• Pascals

• Millimeters of mercury

• Bars

• Atmospheres

What is the correct unit for temperature in the Ideal Gas Law?

• Kelvin

• Fahrenheit

• Rankine

• Celsius

How do you rearrange the Ideal Gas Law to solve for the number of moles?

• PV = nRT

• n = RT/PV

• n = PV/RT

• RT = PV/n

What is the first step in solving the example problem using the Ideal Gas Law?

• Convert moles to grams

• Convert temperature to Celsius

• Convert volume to liters

• Convert pressure to atmospheres

How do you convert millimeters of mercury to atmospheres?

• Add 760

• Subtract 760

• Multiply by 760

• Divide by 760

What is the conversion factor to change Celsius to Kelvin?

• Add 100

• Subtract 100

• Subtract 273

• Add 273

What is the final calculated value of moles in the example problem?

• 0.318 moles

• 0.517 moles

• 0.217 moles

• 0.418 moles

Which unit cancels out when solving for moles using the Ideal Gas Law?

• All of the above

• Atmospheres

• Kelvin

• Liters

Why is the Ideal Gas Law useful in practical applications?

• It helps measure the weight of gases.

• It allows calculation of moles from known pressure, volume, and temperature.

• It determines the color of gases.

• It predicts the chemical reactions of gases.