To Answer your question, it can be reversed, but it not so easy.
Look at what I found in an article:
"Physical changes, like the melting of a solid to a liquid can be reversed easily - just refreeze it.
Chemical changes, like the blackening of toast when burnt, are not so easy to reverse."
Hope I Helped
-- Nick
____________________________________________
Please check out my YouTube account, I am going to have some Chemistry experiments and explanations up in a few months! : http:/www.youtube.com/truetechgeek
____________________________________________
When you bake a cake the cake goes from liquid to solid changing chemically. Now try to imagine unbaking that same cake. It's hard to reverse a chemical change because a new substance is formed in that change
A chemical change is a change that cannot be undone. A chemical change cannot be reversed because a new substance will be formed.
well.... it is called "irriversible process".... that's what my friend says....if you wish you can call it "unidirectional process" or a "chemical change".
It is called an irreversible change. that's a big word so be careful.
An irreversible chemical change is a chemical change that cannot be put back to its orginal state
Chemical change.
Of course you can. That is what you call "chemical change". Put indicator fluid in water. You'lle see what I'm talking about.
Let's call it a biological change. It has elements of both physical and chemical, but wool doesn't "form" on a sheep like, say, mold on a loaf of bread; wool is sheep hair and it grows out of hair follicles all over the animal.
Chemical Energy
Call 911 or Poison Control or your local emergency number immediately. If you are able to find the container that the chemical came from, have it with you when you call. Read it to see if it says to give the person milk or water or anything else. If it does, give the person what it says to give them. If it doesn't say to give them anything, DO NOT give them anything. When the person from 911 or Poison Control answers the phone, read them the name of the chemical. Spell it if you cannot pronounce it. Do what the person from 911 or Poison Control says to do.
A short representation of a chemical reaction would be the net ionic equation.
The substance formed in a chemical change is called Product.
Chemical
It is a chemical change because inside the stove the Kerosene gets burnt and produces flames and energy in the form of heat and light. We cannot get back Kerosene again from the products of is combustion. Hence, we call the combustion of Kerosene as a Chemical Change.
This is a chemical reaction. When substances change you can call it chemical.
A mixture that produces a chemical reaction, scientifically speaking, is a chemical change.
They are just two different terms that mean the same thing.
The PHASE change of solid TO gas is called Sublimation.
umm....CHEMICAL change..! 0.o
answer TRANSMUTATION
a chamical change is when something like your butt explodes into many pieces and you can't glue it back. it is also when you can't poo for seventeen years. thank you come again, no refunds , no checks. we will give free advertisement. must be 18 or older to call. now goodbye
Not necessarily. There's something called the enthalpy of mixing which can be responsible for lowering the temperature when two substances are mixed even if no chemical reaction occurs. It may also be an endothermic reaction; if there are other signs of a reaction (formation of a precipitate, evolution of a gas, color change, etc.) then it probably is a chemical reaction.
The law of conservation of mass (or matter) states that mass (or matter) cannot be created or destroyed during a chemical reaction. *Matter is anything that has mass and takes up space, so a lot of scientists call this the law of conservation of matter.