Question

1. What happens to water as it evaporates?

2. Why will an empty water bottle that is put in the fridge become dented?

3. How does the kinetic theory describe gas particles?

Answer 1

1. The molecules begin to spread farther apart and become more mobile
2. Because of the pressure differences and temperature changes
3. Because the gas particles collide with one another and against the walls of the containers and bounce off in a different direction, but continue moving

Answer 2

for 1 you could also describe it as the bonds between the molecules becoming weaker

Answer 3

Thank you Vane11!

Answer 4

When a empty plastic bottle (with the cap on) is placed in a refrigerator the air in the bottle is warmer than the ambient temperature. The cold air in the fridge will cool the outsides surface fo the bottle , which will in turn cool the inside surface of the bottle. When the bottle has cooled down air particles inside that bounce of the sides will losses energy and slow down a little bit.
This means the air particles (in the bottle) will have less energy in collisions with other air particles , and hence the pressure inside the bottle will reduce. The air pressure in the refrigerator will remain the same , and hence there will develop a pressure difference . The relatively higher pressure outside the bottle will push the bottle on all sides and at the weakest points the plastic bottle will crumple in on it self a little bit.

Answer 5

Water evaporates when some of the water molecules are traveling fast enough to leave the liquid state and escape as gaseous particles.
This is different to boiling. Boiling occurs when all the particles have enough energy ,
evaporation is when only the fastest of the molecules have enough energy

Answer 6

Thank you UnkleRhaukus! (: