Question

What happens when a liquid is heated?

Answer 1

We will start answering this question by knowing a basic idea about liquids. We know that when you heat a liquid, the particles gain more energy and move quicker and faster, expanding the liquid. We will later explain the effects of temperature on this liquid.

Complete answer:
We already learnt that when you heat a liquid, the particles gain more energy and move quicker and faster, expanding the liquid. As the temperature rises, the most energetic particles at the surface of the liquid escape as vapour. As liquids heat up, they evaporate faster, allowing more particles to break off.

Hence when a liquid is heated, it transforms into a gas (or converted into vapour).

Additional information:
To counteract the attraction between them, the particles require energy. As the liquid warms up, more particles have enough energy to escape the liquid. Even particles in the middle of the liquid eventually generate gas bubbles in the liquid. The liquid is now boiling and turning into gas. The particles in the gas are identical to those in the liquid; the difference is that the gas particles have higher energy.

Note: All materials have a certain temperature at which they boil when exposed to normal atmospheric pressure. The temperature at which something starts to boil is known as the "boiling point."Remember that you have to mention both points that it boils as well as converts into a vapour state. Thus phase change takes place when any liquid is heated. You can also give an example of water.