Which of the following are correct? 1. The fraction of collisions with energy greater than or...
Which of the following is not a factor involved in determining the rate of a chemical reaction? the fraction of collisions which occur with a favorable orientation the total number of collisions per unit time the fraction of collisions with energy greater than the activation energy the molar mass of the reactants
Which of the following statements is/are correct? 1) The term e-Ea/RT in the Arrhenius equation is the fraction of reactant molecules having energy less than the activation energy Ea. 2) As a general rule, the probability of correctly oriented collisions between reactant molecules will be low if the molecules are structurally simple, and high if the molecules are complex. 3) The concentration dependence of the rate for an elementary process in a reaction cannot be determined from the stoichiometric coefficients...
At 27°C, what is the fraction of collisions with energy equal to or greater than an activation energy of 88.60 kJ/mol? Give your answer in scientific notation.
At 44 °C, what is the fraction of collisions with energy equal or greater than an activation energy of 80.90 kJ/mol? 3.13 × 10-14 4.00 × 10-15 4.67 × 10-14 9.37 × 10-15 7.17 × 10-15 1.46 × 10-14
3. Which of the following changes will increase the fraction of collisions that are effective collisions? O increasing the temperature O increasing the concentration of the reactants O decreasing the concentration of the reactants O increasing the surface area of the reactants O All of these choices are correct 2 3 4 6 7 8 9
Which of the following statements about an elementary process or step is/are correct? 1) Intermediates in a reaction cannot be involved in the rate determining step ii) In the rate equation for the forward reaction of an elementary step, the overall reaction order is equal to the number of reactant molecules in the step iii) To be the rate determining step in a mechanism, an elementary step must be exothermic O A. ii and ill only B. i and iii...
Which of the following statements about an elementary process or step is/are correct? 1) Intermediates in a reaction cannot be involved in the rate determining step ii) In the rate equation for the forward reaction of an elementary step, the overall reaction order is equal to the number of reactant molecules in the step iii) To be the rate determining step in a mechanism, an elementary step must be exothermic O A. ii and ill only B. i and iii...
Most reactions occur by a series of steps. The energy profile for a certain reaction that proceeds by a two-step mechanism is shown below. 2 1 Reaction coordinate In regard to the energy profile, identify the following. (a) The positions of reactants and products reaction coordinate for reactants 1 reaction coordinate for products 3 (b) The activation energy for the overall reaction. (Enter your answers in increasing numerical order.) the energy difference between reaction coordinatesSelect and-Select (c) AE for the...
Study the following reaction energy diagram: ol. energy reactants products Then answer the following questions about the chemical reaction. Does this reaction release or absorb energy? release absorb neither How many transition states occur during this reaction? yes Could this be an elementary reaction? no 0 If you said this reaction could not be elementary, then how many steps are in its mechanism? If you said this reaction could not be elementary, then enter the number of the step in...
6. All parts of this question relate to the following reaction coordinate diagram, for the reaction A + B + C -- --> D+E Free Energy B+C+X D+E A+B+C (a) Write a mechanism for the forward reaction, showing all elementary steps. (b) What intermediates (ie, not reactants or products) are present in this mechanism? (a) Write a mechanism for the forward reaction, showing all elementary steps. (b) What intermediates (i.e, not reactants or products) are present in this mechanism? (e)...