chapter 16 review for test – Flashcards
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Which expression represents a reaction rate?
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number/time
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Another name for the activated complex is
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transition state
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At what stage of a reaction do atoms have the highest energy?
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transition state stage
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Why does a higher concentration make a reaction faster?
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There are more collisions per second only.
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Why does a catalyst cause a reaction to proceed faster?
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The activation energy is lowered only.
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The rate of a chemical reaction normally ____.
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increases as reactant concentration increases
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Which of the following substances act as catalysts in the body?
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enzymes
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Consider the reaction N (g) 3H (g) 2NH (g). What is the effect of decreasing the volume on the contained gases?
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The reaction shifts toward the product gas.
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Entropy Measures
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force
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Why does a higher temperature cause a reaction to go faster?
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There are more collisions per second only.
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What happens to a catalyst in a reaction?
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It is unchanged.
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At equilibrium, what is the rate of production of reactants compared with the rate of production of products?
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The same
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If a reaction is reversible, what are the relative amounts of reactant and product at the end of the reaction?
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some product; some reactant
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If a reaction has an equilibrium constant just greater than 1, what type of reaction is it
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reversible, favoring products
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The energy that is available to do work in a reaction is called
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free energy
