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That is really hard to answer... There is no ONE thing that changes when a change of state occurs because one thing leads to another... If I had to give one answer, I'd have to say energy changes.
When a atom or molecule changes state, it can gain energy (liquid to gas or solid to liquid for example) and the bonds are stressed (more of a springy effect) between the protons to electrons as well as covalent and ionic bonds. So the stability decreases while the size of the element or compound increases.
A good example of this is leaving a water bottle outside in the sun. The sun adds energy to the water, making it turn into a gas, the gas increases the pressure inside the bottle, thus making the bottle expand.
*If you think about frozen water expanding the bottle it will trip you up. Water is special in that it expands when it freezes as well. I can't think of a common example for expansion right now other than water.*
The electrons/ "vibrations" of the atoms also increase in speed.
When they lose energy (gas to liquid, liquid to solid), the size decreases as does the speed of the electrons/ vibrations. Hence why absolute zero has no electron movement at all. Generally this also strengthens the bonds of the compounds because the bonds are not as stressed. They are more stable.
So, simple one word answer? Energy.
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Is melting a change to metal physical changes?
melting is a physical change. freezing is also a physical change. the only thing that changed was the state of matter. a chemical change for example is buring, the substance changes to co2 and h2o.
How does vertical acceleration change when an object is dropped?
It doesn't. The acceleration is the same before and after; the only thing that changes is that the opposing force goes away.
Does a change of state result in a change in mass?
No. Physical and chemical changes do not result in less mass, only different arrangements of the atoms and molecules. Changing mass requires either a nuclear reaction such as decay or fusion, or adding very large amounts of energy to the atomic particles (which increases their apparent mass under special relativity).*Also, technically, there is less mass in a positive ion than in a negative ion, because electrons have been removed to create a positively-charged atom, and added to create a negatively-charged ion. But no mass is lost or converted, only the movement of practically negligible mass from atom to atom.
Is a change in phase a chemical or physical change?
A phase change is when matter changes into another form but keeps its properties.For example, ice melting into water is an example of the phase change melting.The main types of phase changes are melting, vaporization, freezing and condensation.- Melting is when a solid turns into a liquid.- Freezing is when a liquid turns into a solid.- Vaporization is when a liquid turns into a gas. Boiling is a form of vaporization when the change takes place throughout the liquid. Evaporation is a form of vaporization in which the phase change takes place only at the top of the liquid.- Condensation is when a gas turns into a liquid.- There is also sublimation, which is when a solid turns directly into a gas.- Deposition is when a gas turns directly into a solid.
Does mass change when gravity changes?
No. The mass of any object is constant wherever it is. Only its weight changes.
Is melting a change to metal physical changes?
melting is a physical change. freezing is also a physical change. the only thing that changed was the state of matter. a chemical change for example is buring, the substance changes to co2 and h2o.
Is melting a physical change to metal?
melting is a physical change. freezing is also a physical change. the only thing that changed was the state of matter. a chemical change for example is buring, the substance changes to co2 and h2o.
Is the conversion of liquid water into gaseous water is a chemical change?
No, the only thing being changed are the physical properties of the water, its still just water after the conversion
Is Boiling oil a physical change or a chemical change?
Physical ... it's only a state change. Cool it and it reverts to its old condition.
Does an object changes its mass when it changes to gas?
Actually no, the only thing that changes is the density. The mass doesn't change when it's changing states.
Melting of ice chemical or physical change?
Melting ice is a physical change, because there is no new substance formed. The only thing that changes is the state of matter.
How does a baby cheetah change as it grows?
it's behavor and it s size is the only thing that changes
Is water being boiled a chemical change or physical change?
It is a physical change because the water only changes its state from liquid to gas.
What changes water vapor into a solid?
When water changes to water vapor, it has changed its state from liquid to vapor and no chemical change has taken place. It's only a physical change.
What is it when water changes to water vapor?
When water changes to water vapor, it has changed its state from liquid to vapor and no chemical change has taken place. It's only a physical change.
when a candle is alight what is its physical change?
The wax melts and vaporizes, these changes are physical changes caused by te flame. They are a change in state only, and in these no new substance is formed. The chemical change is the combustion of the wax and the wick
What is the most common reason for matter changing its state Why?
Heat change and pressure change are the only reasons, but in our atmosphere, more often heat.
