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How can you tell if somthing has gone through a chemical change?
When chemical changes occur, the atoms are rearranged and the reaction is accompanied by an energy change as new products are generated. Eg of a chemical change is the reaction between sodium hydroxide and hydrogen chloride to produce sodium chloride, or common salt.
True or false The candle wax has undergone a chemical change?
False because the wax would have gone through a physical change since it has only melted and turned into liquid but you can reverse the effect by cooling it so it becomes a solid again. (No new substance formed) When the string is burned by the fire, the change is irreversible. Also, when the string is burned, new substances are created like gases and ash making it a chemical change. Since no new substance forms when the candle wax melts, that's why it is a physical change, not a chemical change.
Is wax melting a physical or a chemical?
This is a physical change, not a chemical change! It is because all the wax is still all there as for if it was a chemical change it would be all gone!Physical. Its physical state changed from solid to liquid. It's chemical make up remains the same.Melting wax is a chemical change because a new substance is forming. Trust me im intelligent and we just learned this in science.physical change :)It is a chemical change because it gives off heat even when it is burning. heat is one of the signs that tell whether it is physical or chemical change. The signs are heat , light's ,gas,discolor.Melting was would be a physical change-- no chemical reaction occurs when something melts or boils. A burning candle is a chemical change, both can occur at the same time.
Has all water gone through the water cycle?
yes
Why flammability is a chemical property rather then a physical property?
a physical property is something that keeps the nature of the substance the same - for example if you boil a metal you can always re solidify it, it will be the same. but if you use acid on something or burn it, it is gone forever. you can't undo that and it is a property that changes the matter of the substance
What is something with no chemical change?
Usually it means that something has gone through a physical change and any chemical properties of that substance are not altered.
What food has gone through a physical change?
hi
What changes has the computer gone through since it was invented?
It has gone through physical change and size change in the shape and technology itself has been modified to hold more and be smaller.
How show that salt has gone through a physical change?
The molecule of sodium chloride remain unchanged.
How do you know if something has gone through evolution?
you know when something has gone through evolution by looking at its earlier relitives.although some things have not gone through evolution
Is an egg gone off a chemical or physical change?
chemical
What does change in volume mean?
When you say that something has gone through a change in volume (The "∆Volume" value in an equation), you are simply saying that it takes up more or less space.
What does change volume means?
When you say that something has gone through a change in volume (The "∆Volume" value in an equation), you are simply saying that it takes up more or less space.
Suger dissolved in water has gone through what process?
it been through phycical change
Is burning of a candle is physical change?
Burning is always a chemical change. Look at it like this; if you can't put it back together like it was to begin with, it most likely has gone through a chemical change i.e. copper oxidizing, burning paper...
What is an example of matter that has gone through a physical change only?
A good example of a simple Physical Change occurs in a tea pot. The hot, liquid water boils and goes off as steam. Steam is still water (no chemical change,) but is now a gas.
How can you tell if somthing has gone through a chemical change?
When chemical changes occur, the atoms are rearranged and the reaction is accompanied by an energy change as new products are generated. Eg of a chemical change is the reaction between sodium hydroxide and hydrogen chloride to produce sodium chloride, or common salt.
