Physics 0625 · IGCSE · Thermal properties and temperature

Thermal properties and temperature — practice question

At $-39\,^\circ\text{C}$, liquid mercury freezes while its temperature remains unchanged. Which row shows whether the mercury takes in or gives out energy and what happens to the bonds between the mercury atoms?

  • Aenergy absorbed; bonds between atoms stronger
  • Benergy absorbed; bonds between atoms weaker
  • Cenergy released; bonds between atoms stronger
  • Denergy released; bonds between atoms weaker

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