It depends on what phase change they are undergoing. If it were going from a solid to a liquid, then the kinetic energy would be greater. Same as if it were going from a liquid to a gas. However, if it were going from a liquid to a solid (or a gas to a liquid), then the kinetic energy would decrease.
The average kinetic energy (temperature) remains constant, as shown on the graph, there is a plateau.
Actually it is undergoing a crappy change.
a physical change will only alter the appearance but will NOT change the substance to another substance =)
It's called sublimation. Its undergoing a phase change. -APEX:)
compound
It is considered a physical change. A chemical change involves chemical reactions that change the substance into another substance. A physical change typically only modifies the form or phase.
change is complete
A substance that speeds up a chemical reaction without undergoing a permanent change itself is a catalyst.
It will change state from a solid to a liquid to a gas and finally to a plasma.
Catalyst
it refers to a substance undergoing a reversible change of colour when heated or cooled
The faster the molecules of a substance are moving, the warmer that substance is, because temperature is really a measurement of the average kinetic energy of the molecules in a substance or object. For a substance to evaporate, or change from a liquid to a gas, it has to become warmer. That means that the kinetic energy of the molecules increases.
A physical change is reversible and does not affect the composition of a substance. On the other hand, chemical change is irreversible and permanent. A substance undergoing a chemical change forms a new substance which has different composition than the original substance.
through it's boiling, melting, and freezing point.
Anything changing to a substance with a different identity is undergoing a chemical change.
As the average kinetic energy of a substance increases, the temperature will increase.
Melting is an example of a physical change because it does not change the chemical composition of the substance undergoing the change. Tarnishing, rusting, and burning are examples of chemical change because they are caused by chemical reactions, which change the chemical composition of the substances undergoing the change.
No. Temperature is not a change of any sort. It is a measure of the average kinetic energy of the particles in a substance.