2.1 States of Matter (Edexcel GCSE Chemistry)

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  • Name the interconversion that takes place when a liquid becomes a solid.

    The interconversion that takes place when a liquid becomes a solid is called freezing.

  • What type of energy allows particles to move in the liquid state?

    The type of energy that allows particles to move in the liquid state is kinetic energy.

  • State what is meant by sublimation.

    Sublimation is when a solid changes directly into a gas.

  • Which state of matter has particles very close together that vibrate about a fixed position?

    The solid state state has particles very close together that vibrate about a fixed position.

  • True or False?

    Particles in a liquid move quickly in all directions.

    False.

    Particles in a liquid have restricted movement and move around each other. Gas particles move quickly in all directions.

  • True or False?

    Energy is needed to change a gas to a liquid.

    False.

    Energy is released when a gas changes into a liquid.

  • True or False?

    The melting point and freezing point of a substance are the same.

    True.

    There is no difference between the melting point and freezing point.

  • What happens to the forces of attraction when a solid turns to a liquid?

    When a solid turns to a liquid, the forces of attraction are overcome or broken.

  • True or False?

    The three states of matter are solids, liquids and gases.

    True.

    The three states of matter are solids, liquids and gases.

  • What is melting?

    Melting is when a solid changes into a liquid.

  • What is boiling?

    Boiling is when a liquid changes into a gas at a specific temperature.

  • What is freezing?

    Freezing is when a liquid changes into a solid.

  • What is evaporation?

    Evaporation is when a liquid changes into a gas.

  • What is condensation?

    Condensation is when a gas changes into a liquid, usually on cooling.

  • What does the term interconversion of state mean?

    Interconversion of state is the change of matter from one state to another due to changes in temperature or pressure.