Consider the following activation energy diagram.
Which of the following statements about the diagram are true?
(a)
(c) Energy
(d)
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Chapter 11 Solutions
Chemistry: Principles and Reactions
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- Substances that poison a catalyst pose a major concern for many engineering designs, including those for catalytic converters. One design option is to add materials that react with potential poisons before they reach the catalyst. Among the commonly encountered catalyst poisons are silicon and phosphorus, which typically form phosphate or silicate ions in the oxidizing environment of an engine. Group 2 elements are added to the catalyst to react with these contaminants before they reach the working portion of the catalytic converter. If estimates show that a catalytic converter will be exposed to 625 g of silicon during its lifetime, what mass of beryllium would need to be included in the design?arrow_forwardConsider the following energy diagram (not to scale) for the reaction. 2CH3(g)C2H6(g) (a) What is the activation energy of the forward reaction? (b) At what point would 2CH3 (g) appear? (c) What is H for the reaction? (d) What is the activation energy of the reverse reaction? (e) At what point would C2H6 certainly be found? (f) What is any species at point C called?arrow_forward. Account for the increase in reaction rate brought about by a catalyst.arrow_forward
- A general reaction written as 2A + 2B → C + 2D is studied and yields the following data. [A]0 [B]0 Initial Δ[C]/Δt 0.100 M 0.100 M 4.00 × 10–5 mol/L • s 0.200 M 0.100 M 4.00 × 10–5 mol/L • s 0.100 M 0.200 M 8.00 × 10–5 mol/L • s What are the proper units for the rate constant for the reaction? Question 9 options: A) L mol–1 s–1 B) s–1 C) L3 mol–3 s–1 D) mol L–1 s–1 E) L2 mol–2 s–1arrow_forwardA general reaction written as A + 2B → C + 2D is studied and yields the following data: [A]0 [B]0 Initial Δ[C]/Δt 0.150 M 0.150 M 8.00 × 10–3 mol/L·s 0.150 M 0.300 M 1.60 × 10–2 mol/L·s 0.300 M 0.150 M 3.20 × 10–2 mol/L·s Determine the initial rate of C production (Δ[C]/Δt) if [A] = 0.200 M and [B] = 0.500 M. arrow_forward(b) Explain what will happen to the activation energy and pre-exponential factor if the following changes were made: Addition of catalyst to the system. Increasing the temperature by two-fold. (i) (ii)arrow_forward
- A general reaction written as A + 2B → C + 2D is studied and yields the following data: [A]0 [B]0 Initial Δ[C]/Δt 0.150 M 0.150 M 8.00 × 10–3 mol/L·s 0.150 M 0.300 M 1.60 × 10–2 mol/L·s 0.300 M 0.150 M 3.20 × 10–2 mol/L·s Determine the initial rate of C production (Δ[C]/Δt) if [A] = 0.200 M and [B] = 0.500 M.arrow_forwardA reaction profile (not to scale!) for the reaction NO, + CO–NO+ CO, is shown below: Е (kJ) 132 NO2 + CO 226 NO + CO2 Reaction Coordinate Which of the following are true? Choose all that apply. |AE is positive. O The energy of the products is lower than the energy of the reactants. O The reaction is exothermic. O If the energy of the activated complex were increased, Ea would increase.arrow_forwardHydrogen gas and iodine vapor react as H2(g)+ I2(g) → 2HI(g). The activation energy of the formation of HI is 1.03x102 kJ whereas the activation energy of the dissociation of HI is 1.77x102 (a). Calculate the enthalpy of reaction for the reaction. (b). Sketch the energy profile for the reaction between hydrogen and iodine. Platinum acts as a catalyst for the reaction above. Sketch the energy profile for the catalyzed reaction in the energy profile. (c). Name the type of catalysis involved and explain qualitatively how the presence of platinum catalyzes the reaction above.arrow_forward
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