Chm 116 Exam 1 questions with answers

Chm 116 Exam 1 questions with answers
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What are Chemical Kinetics? - CORRECT ANSWERS ✔✔the
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study of the rate at which a chemical reaction rates
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occurs.


Units of rate constant k for Zero Order Reaction -
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CORRECT ANSWERS ✔✔M/s |\ |\




Units of rate constant k for 1st Order Reaction - CORRECT
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ANSWERS ✔✔s^-1 |\




Units of rate constant k for 2nd Order Reaction - CORRECT
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ANSWERS ✔✔M^-1 s^-1
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Units of rate constant k for 3rd Order Reaction - CORRECT
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ANSWERS ✔✔M^-2 s^-1
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Whats a reaction mechanism? - CORRECT ANSWERS
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✔✔the step by step process in which a reaction takes
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place

, What factors determine the rate of a reaction? - CORRECT
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ANSWERS ✔✔Temperature, Concentration, Physical state
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of the reactants, and Presence of a Catalyst.
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At the molecular level, how do the four factors that affect
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rate of reaction? - CORRECT ANSWERS ✔✔They affect the
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frequency of successful collisions. |\ |\ |\




Why do reaction rates decrease as the reaction proceeds?
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- CORRECT ANSWERS ✔✔As the reaction goes forward,
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there are fewer collisions between reactant molecules.
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How can we predict the rate of a reaction? - CORRECT
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ANSWERS ✔✔Rate law muthafuqqqa |\ |\ |\




What is a rate law? - CORRECT ANSWERS ✔✔an equation
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that relates the reaction rate to the concentration of the
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reactants. They have a rate constant (k) and a reactant |\ |\ |\ |\ |\ |\ |\ |\ |\ |\



concentration dependence. Rate= k [A]^x [B]^y where x |\ |\ |\ |\ |\ |\ |\ |\



or y is the reaction order.
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How must rate laws be determined? - CORRECT ANSWERS
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✔✔Experimentally!!! They are only written in terms of
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the CONCENTRATION or PRESSURE of the reactants!!
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