Answered

(i) State two ways in which the molecular structure of a liquid is different from the molecular structure of a solid.
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(ii) Explain, in terms of energy, the process which takes place as a solid at its melting point changes into a liquid at the same temperature.
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Answer :

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Final answer:

Solids and liquids differ in molecular structure and shape, and the process of a solid changing into a liquid requires energy to break intermolecular forces.


Explanation:

Differences Between Solid and Liquid States:

  • Structure: Solids have a fixed, ordered molecular structure with particles in a fixed position, while liquids have a more random arrangement with particles free to move around.
  • Volume and Shape: Solids have a definite shape and volume, whereas liquids have a definite volume but take the shape of their container.

Process of Solid to Liquid Transition:

When a solid at its melting point changes into a liquid at the same temperature, energy is added to break the intermolecular forces binding the solid together, allowing the particles to move freely in the liquid state.


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