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Rusting involves the formation of new chemical bonds as iron reacts with oxygen and water to create iron oxides (rust). In contrast, cutting typically involves breaking chemical bonds within the material being cut, such as the molecular bonds in metals or other substances. Thus, rusting is a process of bond formation, while cutting is a process of bond breaking.
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All are examples of chemical reactions except?
Breaking a glass. This is a physical change as the glass does not transform into a different substance. Chemical reactions involve the breaking and forming of chemical bonds to produce new substances.
Is a physical change what happens when chemical bonds break and new bonds form?
No, a physical change does not involve breaking or forming chemical bonds. It only involves changes in physical properties like size, shape, or state of matter. Chemical changes involve the breaking and forming of chemical bonds to create new substances.
Why do physical changes need less energy than chemical changes?
Physical changes require less energy than chemical changes because they involve alterations in the state or appearance of a substance without changing its molecular structure. For example, melting ice into water or dissolving sugar in water are physical changes that primarily involve breaking intermolecular forces, which requires less energy. In contrast, chemical changes involve breaking and forming chemical bonds, which necessitates a greater input of energy to rearrange the atoms into new substances.
Is cutting wood a chemical property?
No, cutting wood is a physical change, not a chemical property. Chemical properties involve the behavior of a substance in chemical reactions, while cutting wood is a mechanical process that changes its shape and size without altering its chemical composition.
What are characteristics do all chemical changes have?
All chemical changes involve the formation of new substances with different properties. They typically involve changes in the arrangement of atoms and the breaking and forming of chemical bonds. Chemical changes are often irreversible and are accompanied by changes in energy.
Is cutting up a pear a chemical reaction?
No, cutting up a pear is a physical change, not a chemical reaction. Chemical reactions involve the breaking and forming of chemical bonds to create new substances, while cutting a pear only changes its physical appearance.
What does the formation of a chemical bond involve?
Electrons involve in forming chemical bonds.
All are examples of chemical reactions except?
Breaking a glass. This is a physical change as the glass does not transform into a different substance. Chemical reactions involve the breaking and forming of chemical bonds to produce new substances.
Is a physical change what happens when chemical bonds break and new bonds form?
No, a physical change does not involve breaking or forming chemical bonds. It only involves changes in physical properties like size, shape, or state of matter. Chemical changes involve the breaking and forming of chemical bonds to create new substances.
What happens to atoms during chemical changes?
Chemical changes involve breaking and forming of bonds between atoms. Chemical energy is required to break bonds. The formation of new bonds releases energy.
Chemical reactions involve the making and breaking?
chemical bonds
What does chemical reaction have to do with making and breaking bonds?
Chemical reactions involve the breaking of bonds in reactant molecules and the formation of new bonds in product molecules. During a reaction, old bonds are broken as energy is absorbed, and new bonds are formed as energy is released. The breaking and forming of chemical bonds are essential for rearranging atoms and creating new substances during a reaction.
Is reactions a chemical or physical?
Reactions can be both chemical and physical. Chemical reactions involve breaking and forming chemical bonds leading to the formation of new substances. Physical reactions involve changes in state, shape, or form of a substance without changing its chemical composition.
What is it called when a substance changes into a different substance?
This process is called a chemical reaction. Chemical reactions involve the breaking and forming of chemical bonds, resulting in the conversion of one substance into one or more different substances with different properties.
What is the breaking and forming of chemical bonds that leads to a change in the composition of matter?
Chemical reactions involve the breaking and forming of chemical bonds, which results in the rearrangement of atoms to create new substances with different compositions. Bonds are broken when energy is absorbed, and formed when energy is released, leading to the transformation of reactants into products. This process is governed by the conservation of mass and energy principles.
How are physical and chemical changes distinguished?
Physical changes involve a change in appearance or state of matter without altering the composition, like melting ice. Chemical changes, on the other hand, result in the formation of new substances with different properties, such as rusting of iron. The key difference is that chemical changes involve breaking and forming of chemical bonds.
How are fusion and fission similar to chemical energy?
Fusion and fission are both nuclear processes that release large amounts of energy by breaking or combining atomic nuclei, while chemical energy involves the breaking or forming of chemical bonds to release energy. All three processes involve converting mass into energy through different mechanisms.
