Why can pressure change state of matter?

If you use a vacuum chamber as an example. When you pump out all the air from a chamber, all the molecules that normally push down on you, are gone, so molecules that are inside the vacuum start to move quicker.

The real answer is keeping the world healthy so we won’t die

Naoh + hbr -> nabr (salt) + h2o ca (oh)2 + 2hbr - - - > ca (br)2 + 2h2o