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Are changes in properties always evidence of a chemical change and why?
Wiki User
∙ 16y ago
No. Boiling water is a physical not a chemical change, and yet clearly steam has very different properties than liquid water does. A chemical change is one which will change the composition or identity of the material. So not only will its properties change, but it's chemical composition will also be changed
Wiki User
∙ 16y ago
Wiki User
∙ 12y agoThe simple answer, is yes. Signs of a chemical reaction are thermal energy produced, change in color, release of gases, and changes in properties. Whenever a substance shows any of these signs, there is always a chemical reaction occuring.
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When a chemical property is observed the identity of the substance of what changes?
Always :)
Is always obvious when a substance undergoes a chemical changes yes or no?
chemical changes form to completely different things so yes
What is always involved when physical or chemical changes occur in matter?
Energy is ALWAYS invoved.
What does not always stay the same and can undergo physical and or chemical changes?
matter
Which one is a chemical change distillation filtration oxidation and electrolysis?
There are two chemical changes in this series. Oxidation always involves chemical change. Electrolysis does too.
What does a chemical change always do?
A chemical change always changes the chemical composition of the reactants to produce products with new and unique properties, different from the reactants.
A substance always has properties even though they are difficult to observe?
chemical properties
What is the property of matter that is always the same no matter the size?
This has lots of answers; some of them are: malleability chemical properties electrical properties color texture I suspect there are more because the size of something rarely changes the intrinsic properties of that something.
Why do chemical reactions always involve a chemical change?
Chemical bonds always break in chemical reactions, causing changes in energy.
When a chemical property is observed the identity of the substance of what changes?
Always :)
How is nuclear change differ from normal chemical change?
Nuclear change usually (but not always) changes the element of an atom itself; at the very least, it changes the isotope of the atom, altering its radiological properties (such as its half life). A chemical change means a change to a molecule in which the atom is bound.
Why do chemical reactions always involve a change in energy?
Chemical bonds always break in chemical reactions, causing changes in energy.
Why chemical properties not always used to identify minerals?
The stripe, and color
What always happens in a chemical change?
Color changes
Do chemical reactions always involve changes in energy?
no
What are some physical properties are constant for pure substances?
This has lots of answers; some of them are: malleability chemical properties electrical properties color texture I suspect there are more because the size of something rarely changes the intrinsic properties of that something.
Why do reactions always involve a change in energy?
Chemical bonds always break in chemical reactions, causing changes in energy.
