Unit 6 FV Review

Based on the kinetic molecular theory, which of the following statements is correct about a sample of gas at a constant temperature and volume?

• The net kinetic energy of its particles decreases due to collisions.

• The net kinetic energy of its particles increases due to collisions.

• It has a constant average kinetic energy.

• Its average kinetic energy is always zero.

Tags

NGSS.HS-PS3-2

Which statement is true about the particles of a solid when the solid increases in temperature?

• They stop vibrating.

• Their kinetic energy increases.

• They move closer to each other.

• The attractive force between them increases.

Tags

NGSS.MS-PS1-4

A list of changes is shown.

A) Temperature decreases

B) Intermolecular bonds become weaker

C) Melting

D) Intermolecular bonds become stronger

E) Temperature remains constant

F) Temperature increases

G) Vibration of molecules slows down

H) Molecules vibrate faster

Which of the above changes would be accompanied by an increase of the kinetic energy of particles in a solid?

• A, B, C, and H

• A, C, D, and G

• B, E, F, and G

• B, C, F, and H

Tags

NGSS.HS-PS3-2

A heating curve has two flat lines, or plateaus. What does the plateau at the higher temperature represent?

• Boiling of a liquid

• Melting of a solid

• Increase in temperature of a substance

• Decrease in temperature of a substance

A cooling curve has two flat lines, or plateaus. What does the plateau at the higher temperature represent?

• Increase in temperature of a liquid

• Decrease in temperature of a gas

• Condensation of a gas

• Freezing of a liquid

Which of the following temperatures describes the value of A?

• 0 °C, because it is the melting point of ice.

• 0 °C, because it is the freezing point of water.

• Less than 0 °C, because B represents the temperature at which ice melts.

• Less than 0 °C, because B represents the temperature at which water evaporates.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following temperatures describes the value of C?

• 100 °C, because it is the melting point of ice.

• 100 °C, because it is the boiling point of water.

• Less than 100 °C, because C represents the temperature at which ice melts.

• Less than 100 °C, because C represents the temperature at which water evaporates.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Based on Boyle's law, which of the following statements is true for an ideal gas at a constant temperature and mole amount?

• Pressure is directly proportional to volume.

• Pressure is inversely proportional to volume.

• The number of collisions is independent of pressure.

• The number of collisions decreases with increase in pressure.

Which of the following most likely happens when the volume of a gas increases?

• The number of collisions of gas particles remains same.

• The number of collisions of gas particles increases.

• The pressure of the gas remains same.

• The pressure of the gas decreases.

The volume of a gas at 2.0 atm is 3.0 L. What is the volume of the gas at 1.5 atm at the same temperature?

• 0.50 L

• 1.0 L

• 1.5 L

• 4.0 L