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10 Cards in this Set
- Front
- Back
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How do bonds break and form during a chemical reaction?
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When chemical reactions change into different substances by breaking and forming chemical bonds.
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What are the two parts of a chemical reaction?
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The product and the reactant
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How is bond formation represented by the snapping sound of two magnets?
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It shows the energy that is released when a bond forms.
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How is bond energy related to your separation of the magnets?
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In order to pull the magnets apart energy is needed similarly energy is needed to break bonds.
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How are exothermic reactions different from endothermic reactions?
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Exothermic reactions release more energy than they absorb, they also have a higher bond energy When endothermic reactions absorb more of the energy than they release, have a lower bond energy.
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Why might it not always be possible to determine the reactants and the products in a reaction? explain your answer in terms of chemical equilibrium.
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The chemical equilibrium depending on the concentration of reactants and products may be formed at the same rate.
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What causes chemical bonds to break during and reaction?
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The addition of energy to the reactants.
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When does a chemical reaction reach equilibrium?
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When the reactants and products are made at the same rate.
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What of the reactants and products determines whether energy will be released or absorbed during a chemical reaction?
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Bond energy
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Before a chemical reaction can start what has to be absorbed by the reactant?
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Energy
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