Take Home Quiz _6 KEY

Take Home Quiz _6 KEY - CHM 114 A/C Take-Home Quiz #6 KEY...

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CHM 114 A/C Take-Home Quiz #6 KEY 1. (2 pts) The following changes to a reaction usually cause the reaction rate to increase: ¾ Increasing temperature; increasing reactant concentration; adding a catalyst (a) Which of the above will NOT change the value of the rate constant in the rate law? Increasing Conc. Explain briefly: The rate constant is a constant at a particular temperature, but changes with temperature according to the Arrhenius equation. A catalyst changes the process by which a reaction occurs, so the value of k changes. If you look at the rate law for a reaction, we see that changing concentration changes rate without affecting rate constant. (b) Which of the above will change the value of the activation energy? Adding a Catalyst Explain briefly: The activation energy is a constant at all temperatures and concentrations, but reaction rates change when more collisions meet the activation energy criteria. However adding a catalyst changes the way the reaction occurs and usually lowers the activation energy. 2.
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Take Home Quiz _6 KEY - CHM 114 A/C Take-Home Quiz #6 KEY...

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