Question

A student tightly closed the lid on a container that was used for paint. She heated the container using a Bunsen burner over a low flame for a few moments and observed the sides and top of the container bend outwards slightly. She then turned off the Burner and allowed the container to cool. Which statement explains her observations?

The heat increased the pressure inside the container.
The heat deformed the metal which then bent.
The heat made the container reduce in size.
More air particles entered the container.

Answer 1

The heat increased the pressure inside the container. is the answer