Exploring Physical Properties of Matter

The video tutorial covers a self-assessment for Unit 15 on the physical properties of matter. It discusses the five states of matter, phase changes, and their properties, including entropy and enthalpy changes. The tutorial also explains chemistry terms related to phase changes, the unique properties of water, and the plasma phase. Additionally, it covers the definition of temperature and its behavior during phase changes. The video concludes with instructions for recording scores.

Which of the following is NOT one of the five states of matter?

• Crystal

• Gas

• Liquid

• Solid

Which state of matter has the highest entropy?

• Solid

• Gas

• Plasma

• Liquid

Why are phase changes considered physical changes?

• They result in a new substance.

• They involve a change in chemical composition.

• They maintain the same substance.

• They involve a change in mass.

What happens to entropy and enthalpy when a substance changes from solid to gas?

• Both entropy and enthalpy increase.

• Both entropy and enthalpy decrease.

• Entropy increases and enthalpy decreases.

• Entropy decreases and enthalpy increases.

What is the phase change term for gas to solid?

• Fusion

• Deposition

• Condensation

• Sublimation

Why does ice float on water?

• Ice is denser than water.

• Ice is less dense than water.

• Ice has a higher temperature than water.

• Ice has a lower temperature than water.

What is a plasma phase?

• A liquid that has lost electrons.

• A solid that has gained electrons.

• An ionized gas.

• A gas that has gained protons.

Why is plasma not commonly found on Earth?

• It needs continuous high energy.

• It requires low energy.

• It is a liquid state.

• It is a solid state.

What happens to temperature during the melting process?

• It fluctuates.

• It decreases.

• It stays the same.

• It increases.

What is the definition of temperature?

• Potential energy.

• Average kinetic energy.

• Total kinetic energy.

• Thermal energy.