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Which of these processes is exothermic? i. The boiling of liquid nitrogen ii. The freezing of water iii. The sublimation of dry ice iv. The vaporisation of water
Accepted Answer
The freezing of water (II) is an exothermic process. Here's why:
Exothermic processes release heat into the surroundings. This means the system loses energy.
Freezing is the transition from liquid to solid. Water molecules in a liquid state have more energy and freedom of movement than in a solid state. When water freezes, the molecules slow down, form a more ordered structure, and release energy as heat.
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