Understanding Gases and Gas Laws

What is the primary reason mercury is used in barometers?

• It is the most colorful liquid.

• It is the safest liquid to handle.

• It is the densest room temperature liquid.

• It is the lightest liquid.

Which of the following is NOT a unit of pressure?

• Liters

• Kilopascals

• Millimeters of mercury

• Atmospheres

How does increasing the number of moles of a gas affect the pressure in a container?

• Pressure decreases.

• Pressure fluctuates randomly.

• Pressure remains constant.

• Pressure increases.

Why is the Kelvin scale preferred over Celsius in scientific calculations?

• Kelvin is easier to spell.

• Kelvin is a smaller unit than Celsius.

• Kelvin starts at absolute zero.

• Kelvin is used only in the United States.

According to Boyle's Law, what happens to the pressure of a gas if its volume is halved while temperature remains constant?

• Pressure quadruples.

• Pressure remains the same.

• Pressure doubles.

• Pressure is halved.

What is the relationship between pressure and temperature in Gay-Lussac's Law?

• They are directly proportional.

• They are inversely proportional.

• They are unrelated.

• They are equal.

In Charles's Law, what happens to the volume of a gas when the temperature decreases?

• Volume fluctuates.

• Volume remains constant.

• Volume decreases.

• Volume increases.

What is the ideal gas constant R when using kilopascals as the unit of pressure?

• 62.4 millimeters Mercury liters per Kelvin mole

• 8.31 kilopascal liters per Kelvin mole

• 82 atmosphere liters per Kelvin mole

• 101.3 kilopascal liters per Kelvin mole

Which variable is NOT held constant in the Ideal Gas Law?

• Temperature

• Volume

• Pressure

• Number of moles

In the Ideal Gas Law, what does the variable 'n' represent?

• Number of moles

• Temperature

• Volume

• Pressure