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What is the substance that changes the rate of chemical reactions without being changed called?
Wiki User
∙ 13y ago
In biological systems an enzyme speeds up the reaction without changing it.
In other chemical reactions this function is achieved by a catalyst.
Wiki User
∙ 13y ago
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When a substance changes into a diffrent substance what change has occurred?
chemical change
Cooking a chemical or physical change?
Both of those processes are parts of cooking. It depends on what you're doing. If you're melting or freezing its a physical change. If you're changing it into another substance then its chemical. A chemical change is when a substance is changed into another entirely different substance. This happens when an event occurs that changes the composition of the substance. Examples of chemical changes are color changes, absorbing energy, releasing energy, odor changes, producing gases, producing solids, and can't be easily reversed. A physical change is when there is a change is physical properties. This happens when an event occurs that doesn't change their chemical. Examples of physical changes are changes in the texture, shape, size, color, odor, volume, mass, weight, and density.
Why do chemical reactions always involve a change in energy?
Chemical bonds always break in chemical reactions, causing changes in energy.
What is it called when one or more substances change into one or more new substances?
This could refer to a chemical transformation (chemical change), a chemical reaction, or spontaneous change. Some changes require another substance or substances to be mixed together. Some reactions will occur by themselves without any outside manipulation or stimulation.
What is it called when a substance changes into a different substance?
Chemical change.
How is a chemical property different from a physical property?
Chemical properties describe how a substance will undergo chemical reactions and with what. Chemical changes are when one or more substances change to some other substance or substances.
What are reversibile reactions?
Reversible reactions usually involve a reaction that changes the physical state of the substance, not the chemical properties
What is chysical change?
Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions.
What are 5 chemical changes and how are they chemical changes?
Chemical Changesthe release of gasgreater changes of heatthe generation of lighta change of colorthe formation of a precipitateThese are chemical changes because they change the substance's properties.
When a substance changes into a different substance a change has occured?
Reactants form product(s) during a chemical reactions, generally by oxidation, reduction, hydrolysis, or chemical bonding.
When a substance changes into a different substance what change has occured?
Reactants form product(s) during a chemical reactions, generally by oxidation, reduction, hydrolysis, or chemical bonding.
Can a substance produced during a chemical change be easily changed back into the original substance?
No they cannot. Chemical changes never ever go back.
What a substance changes into a different substance a change has occur what is created when chemical reactions join atoms together?
After a chemical reaction new compouds (called also products) are formed.
Is seeds to pumpkin physical or chemical change?
This process involve chemical reactions but also physical changes.
Do chemical changes affect the chemical structure of a substance?
yes chemical properties do change a substance physical properties just change the physical shape or look!!!
Are chemical changes irreversible If yes then what about the chemical reactions that are reversible Don't we say that all chemical reactions are chemical changes?
some chemical changes can be reversed but they are hard to reverse usually
When a substance changes into a diffrent substance what change has occurred?
chemical change
