How does heat affect the molecules in a substance?

Answer 1

They rapidly vibrate.

Yes, they do, but how rapidly depends on the amount of heat (kinetic energy) added to the molecules. If solid, they will eventually melt depending on which solid and what its melting point is. If liquid, they will eventually become a gas or vapor, and a gas will expand indefinitely into the atmosphere if not contained within something.

Think of water: ice heats to liquid water which in turn becomes steam (vapor) which goes out into the atmosphere unless it is contained. If the container cannot expand and the water vapor (or any other gas) continues to be heated, eventually the gas will cause the container to explode because the internal pressure will exceed the ability of the container to hold it.

Answer 2

When Particles(molecules) are heated .

According to the particles theory when particles are heated they move fast and spread farther apart .

thats why , when water is heated the particles move faster and faster and spread farther apart therefore that water then turns into steam .

Answer 3

The molecules spread apart because of the heat.

Answer 4

Heat can make molecules expand. if a lot of heat is added to a single molecule, the molecule CAN and probably will break, thus making a knew arrangement of atoms.

Answer 5

The heat heats up the liquid changing it into a gas the molecules in a gas are spread apart and move fast but the molecules are the same because they are water molecules

Answer 6

Heat affects molecules by making them move faster when it gets hotter and slowly when it gets colder.

Answer 7

When we increase heat in molecules the molecules will spread up and starts moving.

Answer 8

Molecules move faster.