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What is always involved when physical or chemical changes occur in matter?
Wiki User
∙ 12y ago
Energy is ALWAYS invoved.
Wiki User
∙ 12y ago
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Is melting iron into liquid a chemical change?
No, all changes of state are physical, never chemical. It always can be reversed by temperature change only and no other compound are involved.
What does not always stay the same and can undergo physical and or chemical changes?
matter
Is a burning wood into ashes and smoke a physical or chemical change?
Burning wood is a chemical change - although, like most chemical changes it is accompanied by a physical change. Usually we reserve the term physical changes for things like erosion, melting, or evaporation where no change in composition occurs.
Is sugar burning in a pan chemical or physical change?
Burning Sugar is a chemical change. Burning or oxidization is always a chemical change. The process takes in Oxygen and Sugar and outputs different compounds including water, carbon dioxide, carbon monoxide, and other carbon residue. Explanation 2: Chemical changes are changes in what things are made out of. Physical changes are like ice melting ice and liquid water are still water one is a solid but the other is liquid. steam is a gas but is still water. these changes do not change what water is.
Can a physical change form a new material?
No, if a new material forms that would be a chemical change. Physical changes always remain with the same material you began with.
Is energy always involved in physical or chemical changes?
Yes
What is always a characteristic of a chemical change but not always a characteristic of a physical change?
When a chemical change takes place, the chemical structure of particles involved changes (i.e. one or more new substances are formed). In a physical change, the physical state of the particles involved changes (e.g. a solid melts and becomes a liquid). The chemical structure of the particles does not change, and no new substance is formed.
What is always involved in physical or chemical change in matter?
Energy is always involved.
Are phase changes physical or chemical in nature?
A phase change is a physical change. It is not a chemical change.
Is melting iron into liquid a chemical change?
No, all changes of state are physical, never chemical. It always can be reversed by temperature change only and no other compound are involved.
What changes are always involved in chemical reactions?
electrons are always involved in chemical reactions. how they are positioned which atom they are located if they are sharing paired unpaired etc.
What does not always stay the same and can undergo physical and or chemical changes?
matter
Are melting butter and melting ice cream are both physical change or chemical change?
They're both physical changes. Phase changes are always physical changes. Chemical changes only involve chemical reactions - a change in the identity of the substance. That's why phase changes are physical changes. Ice cream remains ice cream when it melts.
Is a match ignites to form ash and mixture of gases a physical or chemical changes?
Ignition of any kind is always a chemical change.
Why is cutting hair a physical change?
Yes. But remember; it will always grow back!
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.
Why do we say that chemical reactions always involve changes in energy?
Because they do. In fact, you can't get ANYTHING done without some energy changes involved.
