Question

Why it is dangerous to heat a completely sealed container of a liquid or gas?

Answer 1

Answer:

First of all, it is important to know that substances expand on heating. So,

If we take a sealed container of liquid or gas and heat it, then, the liquid or gas in it will expand causing the bottle to explode. This is why it is recommend to fill any container leaving a little space on top for allowing expansion and contraction.

Hope this helps.

Answer 2

Answer:

Molecules of a gas move randomly. In a sealed container they exert a force when they collide with the container walls and this applies a pressure to the container. ... This is why fires near sealed gas cylinders are extremely dangerous. If the cylinders heat up enough, their pressure will increase and they will explode.