Table of Contents
What are activators in chemistry?
CHEMISTRY GLOSSARY Activator is a substance that increases the activity of a catalyst; for example, a substance that – by binding to an allosteric site on an enzyme – enables the active site of the enzyme to bind to the substrate.
What are two examples of a chemical change?
Rotting, burning, cooking, and rusting are all further types of chemical changes because they produce substances that are entirely new chemical compounds. For example, burned wood becomes ash, carbon dioxide, and water.
How does activation energy affect a chemical reaction?
The activation energy of a particular reaction determines the rate at which it will proceed. The higher the activation energy, the slower the chemical reaction will be. The example of iron rusting illustrates an inherently slow reaction. This reaction occurs slowly over time because of its high EA.
What is activation energy in physical chemistry?
activation energy, in chemistry, the minimum amount of energy that is required to activate atoms or molecules to a condition in which they can undergo chemical transformation or physical transport.
How are physical changes different from chemical changes?
No new substanceis created during a physical change, although the matter takes a different form. The size, shape, and color of matter may change. Physical changes occur when substances are mixed but don’t chemically react. How to Identify a Physical Change .
How are chemical changes permanent and irreversible?
The change in which the molecular composition is completely altered and a new product is formed is called a chemical change. Chemical changes create a new product. The changes in Chemical change are irreversible and permanent. It reveals that chemical change cannot be reversed by changing or altering the experimental changes.
How can you tell if a chemical change took place?
There may be clues that a chemical reaction took places, such as light, heat, color change, gas production, odor, or sound. The starting and ending materials of a physical change are the same, even though they may look different.
When does the energy change during a chemical change?
During a chemical change the energy changes occur. There is an energy difference in the breaking of old bonds in reactants and formation of new bonds in products. The reaction is called as an exothermic reaction if the energy is released and as an endothermic reaction when the energy is absorbed.