BL Ch 10 Gasses ppt

Open Ended

Why is it important to understand the properties that define the state of a gas sample in chemistry?

Multiple Choice

Which of the following properties is NOT typically used to define the state of a gas sample?

• Temperature

• Pressure

• Color

• Volume

Multiple Choice

Which of the following best defines atmospheric pressure?

• The amount of force applied to an area by any object

• The weight of air per unit of area

• The force exerted by gravity on objects

• The pressure inside a closed container

Multiple Select

Which of the following are units used to measure pressure?

• Pascal

• Bar

• Torr

• Joule

Open Ended

Explain the difference between a barometer and a manometer, and describe a situation where each would be used.

Fill in the Blank

Normal atmospheric pressure at sea level is referred to as ___ atmospheric pressure.

Multiple Choice

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

• The volume is halved

• The volume is doubled

• The volume remains the same

• The volume increases four times

Multiple Choice

If you plot the volume (V) of a gas against the inverse of pressure (1/P), what type of relationship will you observe according to Boyle's Law?

• Linear

• Exponential

• Quadratic

• No relationship

Multiple Choice

According to Charles's Law, what happens to the volume of a fixed amount of gas at constant pressure when its temperature increases?

• The volume increases

• The volume decreases

• The volume remains constant

• The pressure increases

Multiple Choice

Which law states that the volume of a gas at constant temperature and pressure is directly proportional to the number of moles of the gas?

• Avogadro's Law

• Boyle's Law

• Charles's Law

• Dalton's Law

Multiple Select

Which of the following variables are directly proportional to the volume of a gas according to the Ideal-Gas Equation?

• Number of moles (n)

• Temperature (T)

• Pressure (P)

• Gas constant (R)

Fill in the Blank

The formula for the density of a gas derived from the ideal-gas equation is d = ___

Open Ended

Explain how you would determine the molar mass of a gas if you are given its mass, volume, temperature, and pressure.

Multiple Choice

Which of the following statements best explains why the van der Waals equation introduces corrections to the ideal gas law?

• To account for molecular attractions and the finite volume of gas molecules

• To simplify the calculation of gas pressure

• To ignore the effects of temperature on gases

• To assume all gases behave identically under all conditions

Multiple Choice

According to Dalton's Law of Partial Pressures, what is the total pressure of a mixture of non-reacting gases equal to?

• The sum of the partial pressures of each gas

• The product of the partial pressures of each gas

• The difference between the highest and lowest partial pressures

• The average of the partial pressures of each gas

Open Ended

Explain how the van der Waals constants 'a' and 'b' differ for various gases and what physical properties they represent.

Fill in the Blank

The ratio of moles of a substance to total moles in a mixture is called the ___ fraction.

Open Ended

Reflecting on today's lesson about gases, what is one question you still have or one concept you would like to explore further?

Open Ended

Explain how the mole fraction of a gas in a mixture is related to its partial pressure.

Multiple Choice

Which of the following best describes the root-mean-square speed (urms) of gas molecules?

• It is the speed exhibited by the largest number of molecules.

• It is the average (mean) speed of all the molecules.

• It is the speed of a molecule whose kinetic energy is equal to the average kinetic energy of all the molecules.

• It is the slowest speed observed among the molecules.

Multiple Choice

What does the kinetic-molecular theory use to explain the pressure inside a container of gas?

• Collisions of gas molecules with container walls

• The weight of the gas molecules

• The color of the gas

• The size of the container

Multiple Select

Which of the following statements about the relationship between molecular mass and speed of gases at the same temperature are correct?

• A gas with lower mass will have a higher speed.

• A gas with higher mass will have a higher speed.

• The average kinetic energy is the same for all gases at the same temperature.

• The root-mean-square speed is independent of molecular mass.

Fill in the Blank

Effusion is the escape of gas molecules through a tiny hole into an ___ space.

Fill in the Blank

The average kinetic energy of gas molecules is proportional to the absolute ___ of the gas.

Multiple Select

Which of the following statements are main tenets of the kinetic-molecular theory of gases?

• Gas molecules are in continuous, random motion.

• The combined volume of all gas molecules is significant compared to the container volume.

• Attractive and repulsive forces between gas molecules are negligible.

• Energy can be transferred between molecules during collisions.

Open Ended

Explain how Graham’s Law relates the rates of diffusion or effusion of two gases to their molar masses.

Open Ended

Describe two key assumptions of the kinetic-molecular model that break down at high pressure and/or low temperature, leading to deviations from ideal gas behavior.

Multiple Choice

Under which conditions does the behavior of real gases deviate most from the ideal-gas equation?

• High temperature and low pressure

• Low temperature and high pressure

• Low temperature and low pressure

• High temperature and high pressure