CH 15: Mechanism of reaction and of catalysis

<p>Results in more collisions and increased reaction rate</p> Signup and view all the answers

<p>Forming intermediate species with reactants</p> Signup and view all the answers

<p>They act as highly efficient catalysts necessary for life processes</p> Signup and view all the answers

<p>It increases in height and shifts to the right</p> Signup and view all the answers

<p>'Less energy-intensive' reactions can be achieved with catalysts</p> Signup and view all the answers

<p>For developing new chemical processes and improving efficiency</p> Signup and view all the answers

<p>By offering a surface for effective collision of reactants</p> Signup and view all the answers

<p>To provide an alternative pathway with lower activation energy</p> Signup and view all the answers

<p>Maxwell-Boltzmann distribution</p> Signup and view all the answers

<p>It increases the area under the curve to the right of a lower activation energy</p> Signup and view all the answers

<p>Higher activation energy leads to a slower reaction rate</p> Signup and view all the answers

<p>Catalysts undergo permanent chemical changes during a reaction</p> Signup and view all the answers

<p>The total number of reactant molecules</p> Signup and view all the answers

<p>It represents the fraction of molecules with sufficient energy to react</p> Signup and view all the answers

<p>It decreases the activation energy</p> Signup and view all the answers

<p>Most molecules have moderate kinetic energies, with fewer having very high or very low energies</p> Signup and view all the answers

<p>It increases the rate of the reaction</p> Signup and view all the answers

<p>It provides an alternative pathway with a lower activation energy, increasing the reaction rate.</p> Signup and view all the answers

<p>The fraction of molecules with sufficient energy to overcome the activation energy barrier.</p> Signup and view all the answers

<p>It increases the area under the curve to the right of a lower activation energy threshold.</p> Signup and view all the answers

<p>Catalysts undergo permanent chemical changes during the reaction they catalyze.</p> Signup and view all the answers

<p>It represents the total number of molecules in the system.</p> Signup and view all the answers

<p>It increases the reaction rate by providing more reactant molecules with sufficient energy to overcome the activation energy barrier.</p> Signup and view all the answers

<p>Lower activation energy leads to a higher reaction rate.</p> Signup and view all the answers

<p>To provide an alternative pathway with a lower activation energy barrier.</p> Signup and view all the answers

<p>It increases the fraction by increasing the area under the curve to the right of a lower activation energy threshold.</p> Signup and view all the answers

<p>It provides an alternative pathway with a lower activation energy barrier, making it easier for reactant molecules to overcome it.</p> Signup and view all the answers

<p>The shape of the distribution curve remains unchanged, but the required energy for reaction decreases.</p> Signup and view all the answers

<p>It increases the proportion of molecules with energies exceeding the activation energy.</p> Signup and view all the answers

<p>Increasing the concentration of reactants in the reaction mixture.</p> Signup and view all the answers

<p>Increasing the concentration of reactants increases the number of molecules in the reaction mixture but does not change the shape of the energy distribution, resulting in an increased reaction rate.</p> Signup and view all the answers

<p>The area to the right of the activation energy threshold represents the fraction of molecules with kinetic energy greater than the activation energy, which can react.</p> Signup and view all the answers

<p>The presence of a catalyst reduces the activation energy, increasing the fraction of molecules that can react, depicted as a larger shaded area under the curve at the same temperature.</p> Signup and view all the answers

<p>Biological catalysts, such as enzymes, act as highly efficient catalysts for biochemical reactions necessary for life.</p> Signup and view all the answers

<p>Increasing the activation energy of a reaction decreases the reaction rate.</p> Signup and view all the answers

<p>Catalysts work by providing a surface for the reactants to come together, reducing the energy needed for effective collisions.</p> Signup and view all the answers

<p>The study of catalysts and reaction mechanisms is crucial for developing new chemical processes, improving energy efficiency, creating new materials, and understanding biological pathways.</p> Signup and view all the answers

<p>Increasing the fraction of molecules with sufficient energy to react</p> Signup and view all the answers

<p>Lowering the activation energy barrier for reactant particles</p> Signup and view all the answers

<p>Enhancing the number of molecules with very high or very low energies</p> Signup and view all the answers

<p>Increasing the number of successful collisions by decreasing activation energy</p> Signup and view all the answers

<p>Increasing the fraction of molecules with sufficient energy to react</p> Signup and view all the answers

<p>Total number of molecules at any temperature</p> Signup and view all the answers

<p>Shifting more molecules to have sufficient energy for reactions</p> Signup and view all the answers

<p>Lowering the activation energy required for successful reactions</p> Signup and view all the answers

<p>By lowering activation energy and increasing successful collisions</p> Signup and view all the answers

<p>Increasing collisions by providing alternative lower-energy pathway</p> Signup and view all the answers

<p>Lowers the energy required for effective collisions</p> Signup and view all the answers

<p>Shifts it to the right and flattens it</p> Signup and view all the answers

<p>More molecules to participate by lowering activation energy</p> Signup and view all the answers

<p>By forming intermediate species to reduce energy pathway</p> Signup and view all the answers

<p>Results in more collisions and increased reaction rate</p> Signup and view all the answers

<p>Designing faster and less energy-intensive reactions</p> Signup and view all the answers

<p>Their effectiveness in facilitating biochemical reactions</p> Signup and view all the answers

<p>To lower activation energy barriers for reactions</p> Signup and view all the answers