In accordance with Boyle's Law, if the volume of the air is restricted, the pressure will increase. If there is no volume restriction, the air will expand.
will be hot
It evaporates.
It evaporates.
Evaperates
If you mean a kid's balloon, nothing. If you mean a hot air balloon, then it slowly cools and thus gets denser (heavier). Therefore it needs to be re-heated periodically.
When air is heated, the molecules in the gas absorb thermal energy and move faster, increasing their kinetic energy. This causes the air to expand and become less dense, leading to a decrease in air pressure. The increased movement of the molecules also results in the air becoming less stable and more turbulent.
it means you should be careful
when air is heated ,air pressure decreases because the molecules are
air gets heated with carben dioxid and the rays of the sun
It falls back down
the air being heated from a fireplace,air from a furnace,boiling water,the air being heated in a hot air balloon.
The density of heated air is less than the density of cooler air.