G2-G3 C1 Kinetic Particle Theory

Which is the main factor that causes the substance to change state?

• Heat

• Forces of attraction

• motion of particles

• arrangement of particle

Describe the movement and arrangement of the particles in the gas state.

• very closely packed,
  orderly arranged;

  vibrate at its fixed position.

• closely packed,
  randomly arranged;

  slide past one another

• far apart,
  randomly arranged;
  moving quickly and randomly in any direction

Describe the movement and arrangement of the particles in the liquid state.

• very closely packed,
  orderly arranged;

  vibrate at its fixed position.

• closely packed,
  randomly arranged;

  slide past one another

• far apart,
  randomly arranged;
  moving quickly and randomly in any direction

A liquid M has a boiling point of 120 ^oC.

It is a liquid at 45 ^oC and it is heated from 45 ^oC to 135 ^oC.

Using kinetic particle theory, describe the motion and arrangement of the particles at 60 ^oC

• very closely packed,
  orderly arranged;

  vibrate at its fixed position.

• closely packed,
  randomly arranged;

  slide past one another

• far apart,
  randomly arranged;
  moving quickly and randomly in any direction

A liquid M has a boiling point of 120 ^oC.

It is a liquid at 45 ^oC and it is heated from 45 ^oC to 135 ^oC.

Using kinetic particle theory, explain what happen to the liquid M at 120 ^oC.

• the particles gained more kinetic energy and slide over one another faster.

• the particles gained more kinetic energy and vibrate at its fixed position faster.

• the particles gained more kinetic energy and move at high speed in all direction

• the particles gained sufficient heat to overcome the forces of attraction between the particles.

A liquid M has a boiling point of 120 ^oC.

It is a liquid at 45 ^oC and it is heated from 45 ^oC to 135 ^oC.

Describe what happen to the temperature of the M when it is boiling.

• the temperature of M increases

• the temperature of M decreases

• the temperature of M remained constant.

A liquid M has a boiling point of 120 ^oC.

It is a liquid at 45 ^oC and it is heated from 45 ^oC to 135 ^oC.

Using kinetic particle theory, describe the motion and arrangement of the particles at 135 ^oC

• very closely packed,
  orderly arranged;

  vibrate at its fixed position.

• closely packed,
  randomly arranged;

  slide past one another

• far apart,
  randomly arranged;
  moving quickly and randomly in any direction

Which statement(s) is/are true?

• temperature remained constant at the melting point and boiling point of the substance during melting/boiling of the substance

• the particles do not gain kinetic energy during the change of state.

• boiling point of a substance is always higher than its melting point.

• During the change of state, the heat gained is used to overcome the forces of attraction between the particles.