Kinetic Molecular Theory

Which type of motion in the figure best represents the movement of gas particles?

• Motion 1

• Motion 2

• Motion 3

• Motion 4

Tags

NGSS.MS-PS1-4

The pressure of each flask is given in atmospheres (atm). Flask 1 has the lowest pressure, and Flask 4 has the highest. Knowing what causes gas pressure, which of the following statements is true?

• Flask 1 contain the most molecules

• Flask 2 contain the most molecules

• Flask 3 contain the most molecules

• Flask 4 contain the most molecules

What happens to matter as its temperature increases?

• The average kinetic energy of its particles decreases

• The average thermal energy of its particles decreases

• The particles gain kinetic energy

• The particles lose potential energy

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Gas pressure is caused by ______.

• gravity.

• gas molecules colliding with each other.

• gas molecules colliding with surfaces of the container.

• gas molecules reacting with each other.

Tags

NGSS.HS-PS3-2

All of the following statements are related to the kinetic molecule theory of gases except:

• gas molecules have no inter-molecular forces

• gas particles are in random motion

• the collisions between gas particles are elastic

• gas particles have no volume

• the average kinetic energy is proportional to the Celsius temperature of the gas

Which is not true about the Kinetic Molecular Theory?

• Gas molecules have forces of attraction for each other

• Collisions between gas molecules lead to a transfer of energy that is conserved

• Gas molecules have a negligible volume compared to the volume they occupy

• Gas molecules move in a random, straight-line motion

Tags

NGSS.HS-PS3-4

Which of the following assumptions is incorrect according to kinetic theory of gases?

• Particles of a gas move in all possible directions in straight lines

• There is no force of attraction between the particles of a gas at ordinary temperature and pressure

• The actual volume of the gas is negligible in comparison to the empty space between them

• All the particles, at any particular time, have same speed and same kinetic energy

Which one of the following statement is not consistent with the kinetic-molecular theory of gases?

• Individual gas molecules are relatively far apart

• The average kinetic energies of different gases are different at the same temperature

• The actual volume of the gas molecules themselves is very small compared to the volume occupied by the gas at ordinary temperature and pressure

• The theory explains most of the observed behavior of gases at ordinary temperatures and pressures

Tags

NGSS.HS-PS3-2

Which postulate of KMT explains why gases are so easily compressed?

• All particles are infinitely small and the size of a particle is negligible compared to the container that it holds.

• The particles of gas are in constant motion and move in straight lines.

• The particles of gas do not exert any force of attraction or repulsion on each other. There is no energy loss during a collision.

• The mean kinetic energy of the particles is directly proportional to their absolute temperature.

Each of the containers is shown at the same temperature. In which container is the average speed of the particles the fastest?

• chlorine

• nitrogen

• hydrogen

• oxygen

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-2

NGSS.HS-PS3-4