Question

05.02]Describe what happens to the particles of a solid, in terms of movement and kinetic energy, as it is heated to its melting point, including whether this is a physical or chemical change.

Answer 1

The particles of the solid move with increasing kinetic energy as the temperature is increased, causing the molecular arrangement to become less and less rigid, until it reaches its melting point, where all of the heat is used to break the bonds between the particles and allow them to become a liquid. It's a physical change.

Answer 2

This is a physical change because there is no change in the chemical makeup of the matter. Think about ice melting. It needs to have energy added in the form of heat to change into liquid water. As the temperature rises, kinetic energy increases, and movement increases. In a solid, the molecules vibrate a little, but in liquid, they are allowed to move more.

Answer 3

good answers guys, id just like to add to make it easier to understand that temperature is a measure of average kinetic energy of atoms/molecules so with that you can more easily understand what happens when you increase temperature or if you wish heat some thing up...