how do chemical reactions affect chemical bonds?
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During chemical reactions, the bonds that hold molecules together break apart and form new bonds, rearranging atoms into different substances. Each bond requires a distinct amount of energy to either break or form; without this energy, the reaction cannot take place, and the reactants remain as they were.
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A chemical bond is a force of attraction between atoms or ions. Bonds form when atoms share or transfer valence electrons. Valence electrons are the electrons in the outer energy level of an atom that may be involved in chemical interactions. Valence electrons are the basis of all chemical bonds.
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Which statement correctly describes how enzymes affect chemical reactions? Stabilization of: the transition state changes the activation energy of the reaction. stabilization of the transition state, not the substrate, provides binding energy that is used to lower the activation energy.
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Key Points. Chemical reactions often involve changes in energy due to the breaking and formation of bonds. Reactions in which energy is released are exothermic reactions, while those that take in heat energy are endothermic.
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When the energy absorbed from the breaking of old bonds is less than the energy released from making new bonds, the excess energy from making new bonds is released as heat, forming an exothermic reaction. These new bonds are stronger, because they released more energy than the bonds in the reactants.
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In a chemical reaction, only the atoms present in the reactants can end up in the products. No new atoms are created, and no atoms are destroyed. In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.
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When atoms join together to form molecules, they are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons between the atoms. It is only the electrons in the outermost shell that ever get involved in bonding.
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In general, when a highly electronegative atom, such as Cl, is bonded to a carbocation, it draws electrons away from the carbon and destabilizes the positive charge. ... The reactivity of a molecule is often affected by the degree of substitution of the carbon bonded to a functional group.
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Chemical reaction. A process during which chemical bonds between atoms are broken and new ones are formed. Producing one or more different substances. reactant. the starting materials in a chemical reaction.
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Physical changes are usually about physical states of matter. Chemical changes happen on a molecular level when you have two or more molecules that interact. Chemical changes happen when atomic bonds are broken or created during chemical reactions.
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['Chemical bonds. Chemical bonds are the connections between atoms in a molecule. ... ', 'Covalent Bonds. Chemical bonds are the forces of attraction that tie atoms together. ... ', 'Ionic Bonds. ... ', 'Bonds, Stability, and Compounds.']
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Chemical processes occur when bonds are broken and reformed. Physical processes occur when intermolecular forces are broken and reformed. A gray area exists between these processes which can be either chemical or physical.
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A chemical change happens when one chemical substance is transformed into one or more different substances, such as when iron becomes rust. Chemical changes occur through the process of chemical reactions, and the resulting substances have different properties because their atoms and molecules are arranged differently.
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In a chemical reaction, the atoms and molecules that interact with each other are called reactants. ... No new atoms are created, and no atoms are destroyed. In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.
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When chemical reactions occur, the atoms are rearranged and the reaction is accompanied by an energy change as new products are generated. An example of a chemical change is the reaction between sodium and water to produce sodium hydroxide and hydrogen.
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Enzymes are catalysts, so they affect activation energy by decreasing the required amount of activation energy allowing chemical reactions to occur or speed up. It does not affect the amount of energy that is released by the reaction.
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Enzymes increase the rate of chemical reactions by reducing the amount of activation energy needed for reactants to start reacting. ... Enzymes aren't changed or used up in the reactions they catalyze, so they can be used to speed up the same reaction over and over again.