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What are physical and chemical changes and how are they the same and how are they different?
Wiki User
∙ 13y ago
Physical changes are changes in something that affects the objects physical characteristics. Meaning things like the color, shape, amount. Example: cutting a piece of paper, painting a wall, etc.
Chemical changes change what the object is made of. It can change everything, including the state the object(or liquid) is in.
Wiki User
∙ 13y ago
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Compare the total amount of energy before and after physical and chemical changes?
Physical Change-- Same amount of energy, but in different form Chemical Change-- Different amount of energy, and in a different form
Are all physical changes accompanied by a chemical change?
A physical change is a change in chemical composition. A physical change is a change where chemical composition is not altered. Not all chemical changes are accompanied by a physical change, but some are. The same is true for the reverse.
Compare the total energy before and after physical and chemical changes?
Physical changes are usually reversible and chemical changes you can't usually reverse them. Frying an egg is chemical because you can't get the raw egg back. Freezing water would be physical... hope this helps! ----------- Chemical change is a change that imply modifications in the structures of molecules; new compounds appear. Ex.: burning of coal with releasing of carbon dioxide and water. Physical changes don't imply the structure modification of the molecules but only the state of matter, form, dimensions; the chemical compound remain unchanged. Ex.: grinding of coal to be used in a thermal power unit.
Is cracking eggs a physical or chemical?
physical change since the egg and the contents inside do not become a new substance they remain the same only thing is that the shape or the appearance or the physical structure changes that is why it is called as a physical change not chemical because its internal composition is the same
Is mashing a potato a chemical or physical change?
Mashing a potato is a physical change because it's the same substance (the potato is still a potato) but in a different form.- - - - -Making mashed potatoes from fresh potatoes is both a chemical and a physical change: there are many chemical changes that occur when you cook a potato, and physical because it doesn't look anything like it did when you started.
Compare the total amount of energy before and after physical and chemical changes?
Physical Change-- Same amount of energy, but in different form Chemical Change-- Different amount of energy, and in a different form
What is the same about physical changes and chemical changes?
they both change in same ways!
Would freezing an object be physical change or chemical change?
Physical changes and Chemical changes are both the same - this would be a reversible change.
Are all physical changes accompanied by a chemical change?
A physical change is a change in chemical composition. A physical change is a change where chemical composition is not altered. Not all chemical changes are accompanied by a physical change, but some are. The same is true for the reverse.
Does chemical and physical properties are probably the same?
No. Chemical and physical properties are different.
What property stays the same during physical or chemical changes?
The mass.
What does not always stay the same and can undergo physical and or chemical changes?
matter
Is twisting a wire chemical or physical change explain?
It is physical. The wire changes shape, but it is still made of the same materials.
Difference between chemical and physical change?
A chemical change is when the chemical properties of a substance changes and a physical change is when the chemical properties stay the same but the physical properties (shape, temperature etc...)
Compare the total energy before and after physical and chemical changes?
Physical changes are usually reversible and chemical changes you can't usually reverse them. Frying an egg is chemical because you can't get the raw egg back. Freezing water would be physical... hope this helps! ----------- Chemical change is a change that imply modifications in the structures of molecules; new compounds appear. Ex.: burning of coal with releasing of carbon dioxide and water. Physical changes don't imply the structure modification of the molecules but only the state of matter, form, dimensions; the chemical compound remain unchanged. Ex.: grinding of coal to be used in a thermal power unit.
How are physical and chemical changes the same?
well both states of matter are changed/ has changed
Is cracking eggs a physical or chemical?
physical change since the egg and the contents inside do not become a new substance they remain the same only thing is that the shape or the appearance or the physical structure changes that is why it is called as a physical change not chemical because its internal composition is the same
