Ideal Gas Behavior and Equations of State: Interactive Learning Quizzes

Question 1

The enthalpy of an ideal gas is:

Accepted Answer

A function of temperature only

Answer

A function of pressure only

Answer

A function of volume only

Answer

A function of temperature and pressure

Question 2

Which of the following processes is an isentropic process for an ideal gas?

Accepted Answer

Adiabatic expansion

Answer

Isothermal compression

Answer

Isobaric heating

Answer

Isochoric cooling

Question 3

The ideal gas law relates which four variables?

Accepted Answer

Pressure, Volume, Temperature, Number of moles

Answer

Pressure, Volume, Temperature, Density

Answer

Pressure, Temperature, Mass, Number of atoms

Answer

Volume, Temperature, Mass, Number of electrons

Question 4

Which of the following units is used to express the universal gas constant R?

Accepted Answer

J/(mol·K)

Answer

L·atm/(mol·K)

Answer

Pa·m³/(kg·K)

Answer

cal/(mol·K)

Question 5

If the temperature of an ideal gas sample is doubled and the pressure is held constant, what happens to its volume?

Accepted Answer

Doubles

Answer

Decreases by half

Answer

Increases by four times

Answer

Remains unchanged

Question 6

In a mixture of gases, the partial pressure of a particular gas is directly proportional to its:

Accepted Answer

Volume fraction

Answer

Molar mass

Answer

Density

Answer

Temperature

Question 7

Which of the following gases exhibits the most significant deviation from the ideal gas model at room temperature and atmospheric pressure?

Accepted Answer

Carbon dioxide

Answer

Helium

Answer

Nitrogen

Answer

Methane

Question 8

A gas initially occupies a volume of 2.0 L at a pressure of 1.0 atm. If the pressure is doubled to 2.0 atm while the temperature remains constant, what will be the new volume of the gas?

Accepted Answer

4.0 L

Answer

1.0 L

Answer

2.0 L

Answer

8.0 L

Question 9

Which of the following factors does NOT influence the pressure of an ideal gas?

Accepted Answer

Mass of the gas particles

Answer

Temperature

Answer

Volume

Answer

Number of moles

Question 10

The van der Waals equation is a modification of the ideal gas equation that accounts for:

Accepted Answer

Both intermolecular forces and non-ideal volume

Answer

Intermolecular forces

Answer

Non-ideal volume of gas particles

Answer

Neither intermolecular forces nor non-ideal volume

Question 11

The ideal gas equation is mathematically expressed as:

Accepted Answer

PV = nRT

Answer

PV = nRT/P

Answer

PV = nRT/V

Answer

PV = RT/n

Question 12

At standard temperature and pressure (STP), the molar volume of an ideal gas is:

Accepted Answer

22.4 L/mol

Answer

32.0 L/mol

Answer

44.8 L/mol

Answer

67.2 L/mol

Question 13

The compressibility factor (Z) is primarily used to:

Accepted Answer

Quantify the deviation of a gas from ideal behavior

Answer

Calculate the molar volume of a gas

Answer

Predict the pressure of a gas

Answer

Determine the temperature of a gas

Question 14

The Van der Waals equation of state is an example of:

Accepted Answer

An equation that corrects for non-ideal gas behavior

Answer

An equation that applies exclusively to ideal gases

Answer

An equation that is used to calculate the work done by a gas

Answer

An equation that is used to predict the heat capacity of a gas

Question 15

A gas cylinder contains 2 moles of an ideal gas at a temperature of 298 K. If the volume of the cylinder is 10 liters, what is the **pressure** inside the cylinder?

Accepted Answer

2.45 atm

Answer

1.22 atm

Answer

6.02 atm

Answer

4.90 atm

Question 16

Which of the following factors would **NOT affect the pressure** of an ideal gas in a closed container?

Accepted Answer

Changing the intermolecular forces

Answer

Changing the volume of the container

Answer

Changing the temperature of the gas

Answer

Changing the number of molecules of gas

Question 17

Which of the following **real gases** exhibits deviations from ideal gas behavior at **high pressures**?

Accepted Answer

Chlorine

Answer

Helium

Answer

Nitrogen

Answer

Hydrogen

Question 18

The van der Waals equation of state introduces two **correction factors** to account for non-ideal behavior. What do these factors represent?

Accepted Answer

Molecular volume and intermolecular forces

Answer

Temperature and pressure

Answer

Volume and number of moles

Answer

Mass and density

Question 19

The Joule-Thomson coefficient is used to describe the temperature change of a gas:

Accepted Answer

When it undergoes an **isobaric process**

Answer

When it undergoes an isothermal process

Answer

When it undergoes an adiabatic process

Answer

When it undergoes a reversible process

Question 20

The ideal gas equation, which relates pressure, volume, temperature, and number of moles of a gas, is:

Accepted Answer

PV = nRT

Answer

PV = NkT

Answer

V = RT / P

Answer

P = RT / V

Question 21

The following properties are characteristic of an ideal gas, except:

Accepted Answer

Particles move in straight lines.

Answer

Particles have no volume.

Answer

Collisions between particles are perfectly elastic.

Answer

Particles have negligible intermolecular forces.

Question 22

The equation PV = nRT describes the behavior of:

Accepted Answer

Ideal gases

Answer

Real gases

Answer

Liquids

Answer

Solids

Question 23

The compressibility factor (Z) of an ideal gas is:

Accepted Answer

1

Answer

0

Answer

2

Answer

3

Question 24

How does the van der Waals equation account for the non-ideal behavior of real gases?

Accepted Answer

By including a correction factor for intermolecular forces

Answer

By assuming negligible molecular size and no intermolecular interactions

Answer

By disregarding the effect of temperature on gas behavior

Answer

By assuming that real gases are perfectly incompressible

Question 25

The ideal gas equation is expressed as:

Accepted Answer

PV = nRT

Answer

PV = RT/n

Answer

PV = n/RT

Answer

PV = kT

Question 26

A gas sample with a volume of 2 L at a pressure of 1 atm undergoes an isothermal expansion until its volume reaches 4 L. What is the final pressure of the gas?

Accepted Answer

0.5 atm

Answer

1 atm

Answer

2 atm

Answer

4 atm

Question 27

Which of the following processes represents an adiabatic compression?

Accepted Answer

A piston compresses a gas with no heat transfer to or from the surroundings.

Answer

A gas expands into a vacuum.

Answer

A gas is heated at constant volume.

Question 28

The compressibility factor, Z, is a measure of how closely a real gas behaves like an ideal gas. Which statement is true?

Accepted Answer

Z = 1 indicates an ideal gas.

Answer

Z is always negative.

Answer

Z > 1 indicates a gas that is more compressible than an ideal gas.

Answer

Z < 1 indicates a gas that is less compressible than an ideal gas.

Question 29

The van der Waals equation includes correction terms to account for:

Accepted Answer

Molecular volume and intermolecular forces.

Answer

Volume and entropy.

Answer

Chemical reactions and phase transitions.

Answer

Temperature and pressure.

Question 30

The critical temperature of a gas is the temperature above which:

Accepted Answer

The gas cannot be liquefied, regardless of applied pressure.

Answer

The gas is most likely to condense.

Answer

The gas has the highest possible density.

Question 31

The Joule-Thomson coefficient is used to calculate the:

Accepted Answer

Change in temperature of a gas undergoing an isenthalpic expansion.

Answer

Change in pressure of a gas undergoing an isothermal expansion.

Answer

Change in volume of a gas undergoing an adiabatic expansion.

Question 32

Which of the following statements about the assumptions of the ideal gas model is correct?

Accepted Answer

The particles have no interactions with each other.

Answer

The particles have strong repulsive forces.

Answer

The particles have strong attractive forces.

Question 33

A mixture of gases contains 0.5 mole of nitrogen, 0.3 mole of oxygen, and 0.2 mole of carbon dioxide. What is the partial pressure of nitrogen in the mixture if the total pressure is 2.0 atm, according to Dalton's law of partial pressures?

Accepted Answer

0.5 atm

Answer

1.5 atm

Answer

2.0 atm

Answer

1.0 atm

Question 34

Which of the following is a unit of pressure?

Accepted Answer

Pascal (Pa)

Answer

Liter (L)

Answer

Mole (mol)

Answer

Kelvin (K)

Question 35

At room temperature and pressure, which of the following gases exhibits the greatest deviation from ideal gas behavior?

Accepted Answer

NH3 (Ammonia)

Answer

He (Helium)

Answer

N2 (Nitrogen)

Answer

CO2 (Carbon Dioxide)

Question 36

The van der Waals equation of state accounts for which of the following factors that are not considered in the ideal gas law?

Accepted Answer

Intermolecular forces and the finite volume of gas molecules.

Answer

Pressure only.

Answer

Temperature only.

Answer

Volume only.

Question 37

Which of the following assumptions is NOT a part of the ideal gas model?

Accepted Answer

Gas molecules have a non-zero volume.

Answer

Gas molecules are considered point masses.

Answer

Gas molecules collide elastically.

Answer

Gas molecules move randomly.

Question 38

Which of the following statements correctly describes a limitation of the ideal gas law?

Accepted Answer

The ideal gas law fails to accurately predict the behavior of real gases at high pressures and low temperatures.

Answer

The ideal gas law is only applicable to gases at constant temperature.

Answer

The ideal gas law assumes that gas particles have no mass.

Question 39

The compressibility factor (Z) for a gas represents:

Accepted Answer

The ratio of the actual volume occupied by the gas to the volume it would occupy if it behaved ideally.

Answer

The ratio of the pressure of the gas to its volume.

Question 40

Among the following gases, which one has the highest critical pressure?

Accepted Answer

Water vapor (H2O)

Answer

Nitrogen (N2)

Answer

Hydrogen (H2)

Question 41

The Joule-Thomson effect describes:

Accepted Answer

The change in temperature of a gas during a throttling process (expansion through a valve) due to intermolecular forces.

Answer

The change in volume of a gas when compressed.

Answer

The change in pressure of a gas when heated.