What happens to water molecules when the temperature rises?

Question

If I put a balloon full of air into a bucket of hot water, would the circumference get larger or smaller? Why?

And what about if I put it in a bucket of ice water, what would happen?
And why??????

Could you pleasssse help me?! Thanks so much and I will choose a best answer ASAP!!!!!!!!!!!!!!!!!!! =)

Answer 1

This has zilch to do with water molecules and everything to do with air molecules.

When air heats up the molecules move faster and they bounce around more so the pressure goes up and the air expands. So in hot water a balloon would get bigger.

And the opposite for cold water, the air molecules slow down and the pressure drops so it will shrink. Ask any boy who has swum in a cold sea.

Answer 2

The zeroth law of thermodynamics says that when two materials of different temperature are touching ,they will exchange energy till they both reach the same temperature.
If you submerge a balloon in water the ballon will reach the same temperature as the water.

When heat radiation is absorbed in water molecules the following happens;
As heat energy is absorbed inside the atom,the electrons in order to maintain power equilibrium in the atom ,expand their orbital radii.
That is why why you heat iron red hot it expand in volume. If more heat is added at higher temperature the Iron changes phases from solid to liquid because the temperature energy between the atom pushes them appart against the electrostatic gravity pressure,and the forces between the atoms is reduced ;the results is now a weaker bond between the atoms ,and the iron is now a liquid. In the case of water the water changes phase at the 373 k and becomes a vapor.
The reverse occurs when you remove heat from the atoms.