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14 Cards in this Set
- Front
- Back
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Explain the collision theory of reactions
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Chemical reactions require collisions with sufficient energy to break and form bonds
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How is the activation energy of a reaction like a wall or barrier?
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Reacting particles must have a certain minimum amount of energy to react to form product, just as it takes a certain amount of energy to climb over a wall or barrier.
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How is the rate of a reaction influenced by a catalyst? How do catalysts make this possible?
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A catalyst increases the rate of reaction by providing an alternative reaction mechanism with a lower activation energy.
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Define a reversible reaction
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In a reversible reaction, reactants are continually forming products and products are continually forming reactants.
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How do the rates of the forward and reverse reactions compare to a state of dynamic chemical equilibrium?
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They are equal
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What is Le Chatelier's principal?
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A system in dynamic equilibrium changes to release a stress applied to it.
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What the solubility product constant (Ksp) represent?
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The product of in concentrations raised to the power of their coefficients.
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How does the addition of a common ion affect the solubility of another substance?
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Lowers the solubility
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Is the free energy of a reaction help predict whether the reaction will be spontaneous?
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A spontaneous reaction has a negative free energy.
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What is the meaning of entropy?
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A measure of disorder in a system.
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The products in a spontaneous process or more orders than the reactants. Is this entropy change favorable or unfavorable?
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Unfavorable
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Are all spontaneous processes exothermic? Explain.
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No, some endothermic processes are spontaneous because of their favorable change in entropy.
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What two factors together detrmine whether a reaction is spontaneous?
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enthalpy change and entropy change
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Energy that is available to do work is called ___.
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Free Energy
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