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In order for a reaction to reach equilibrium, there must be reversible steps between the reactants...
During a chemical reaction, what defines when the concentrations of the reactants and products reach a...
During a chemical reaction, what defines when the concentrations of the reactants and products reach a constant level? A) rate law B) rate constant C) equilibrium D) elementary process E) reversible reaction
2. Consider the reaction below between nitric oxide and hydrogen gas: 2 NO(g) + 2 H2(g)...
2. Consider the reaction below between nitric oxide and hydrogen gas: 2 NO(g) + 2 H2(g) - N2 + 2 H2009) Upon being studied experimentally, it has been determined that the rate law expression for this reaction is first order in Hz and second order in NO(g). With this information in mind, answer the following: [Tip: You can assume that the steady-state approximation is valid for any intermediate here.) a. As written, is the reaction above a valid mechanism? In...
Physical Chemistry II 2. Hydrogen iodide can be synthesized from the elements in a gas-phase reaction....
Physical Chemistry II
2. Hydrogen iodide can be synthesized from the elements in a gas-phase reaction. One proposed mechanism for the process is (20 pts) 1, 21(1" order) and E= 320kJ/mol ki k 21—1, (20 order) and E, = 440kJ/mol 21+H, → 2HI (36d order) and E, = 210kJ/mol Derive a differential rate law for the rate of production of HI if a) 1, and I are in equilibrium throughout the reaction (Rapid Equilibrium) b) Derive the differential rate law...
Q(1) During a chemical reaction, what defines when the concentrations of the reactants and products reach...
Q(1) During a chemical reaction, what defines when the concentrations of the reactants and products reach a constant level? A) Elementary process B) Rate constant C) Reversible reaction D) Equilibrium E) Rate law Q(2) Which is the correct equilibrium constant expression for the following reaction? FeO(s) + H2(g) - Fe(s) + H2O(g) A) Ke = [H2O] / [H2] B) Ke=[Fe][H2O] / [Fe2O3] [H2] C) Ke=[Fe) (H20] / [Fe2O3] D) Kc = [Hz] / [H2O] E) Ke= [Fe2O3] [H2] / [Fe][H2O]...
Problem 4: Horiuti-Polanyi Mechanism and Alkene Hydrogenation The hydrogenation of alkenes by heterogeneous catalysts has been...
Problem 4: Horiuti-Polanyi Mechanism and Alkene Hydrogenation The hydrogenation of alkenes by heterogeneous catalysts has been studied for 80 years and has a mechanism that was proposed by Horiuti and Polanyi in 1934 which consists of 3 steps: i) alkene adsorption on the surface of the hydrogenated metal catalyst, ii) hydrogen migration to the beta- carbon of the alkene and finally ii) a reductive elimination of the free alkane Ki = k/k! k4 Assume that *, H*. C2H*, and C2Hs*...
Ation. 7. Consider a collision-induced unimolecular decomposition reaction of the form A B+C. (a)...
ation. 7. Consider a collision-induced unimolecular decomposition reaction of the form A B+C. (a) Write down the three elementary steps in a Lindemann-Hinshelwood mechanism per- taining to such a decomposition reaction. (b) Use the steady-state approximation to obtain an expression for the rate of pro- duction of the products B and C, when the concentration of A is sufficiently high that (c) Express the rate you obtained in (b) in terms of the equilibrium constant pertain- ing to the activation...
The reaction between nitric oxide (nitrogen monoxide) and oxygen gives nitrogen dioxide according to the stoichiometric...
The reaction between nitric oxide (nitrogen monoxide) and oxygen gives nitrogen dioxide according to the stoichiometric equation. 2 NO(g) 02(g)2 NO2(g) 1. Write the rate law expected if the reaction was found to occur in a single step The reaction is observed to be complex with the following mechanism is proposed: 2 NO N202 N202 2 NO N202 +02 → 2NO2 k2 kı k. -1 2. Use the steady state approximation to obtain the expression for the formation of NO2....
Problem 2) Experimentally, the reaction between compound A and iodine (l): A(aq) + 12(aq) - D(aq)...
Problem 2) Experimentally, the reaction between compound A and iodine (l): A(aq) + 12(aq) - D(aq) + Hl(aq) is 1st order with respect to A, first order with respect to H+, and zero-th order with respect to lz. The following mechanism has been proposed: Step 1. A(aq) + H+(aq) + HA+(aq) Step 2. HA+(aq) → B(aq) + H+ (aq) Step 3. B(aq) + 12(aq) → D(aq) + Hl(aq) Find the rate law for the reaction if a) the second step...
2. If the reaction between iron(III) ion and thiocyanate ion yielded an equilibrium concentration of 0.30...
2. If the reaction between iron(III) ion and thiocyanate ion yielded an equilibrium concentration of 0.30 M for each of these ions, what is the equilibrium concentration of the red iron(III)-thiocyanate complex? (Hint: The equilibrium constant for the reaction is in the Background section.) Show your work 3. In the reaction below, NH3(g) + H2O(1) - NH; +H30+ the equilibrium constant is 10-34. Is this reaction likely to take place? Explain your answer. iron(III) and thiocyanate ions, the equilibrium expression...
8. Write down a complete set of equations for the reaction diagram (16). [The first two...
8. Write down a complete set of equations for the reaction diagram (16). [The first two equations are given in (17a, b) .] Show that equation (18) is obtained by making a quasi-steady-state assumption. . C. A QUICK, EASY DERIVATION OF SIGMOIDAL KINETICS One of the features of Michaelis-Menten kinetics not shared by more complex molecular pathways is that for low precursor concentrations it yields an approxi- mately linear rate of reaction. (The graph of -dc/dt versus c is almost...
During a chemical reaction, what defines when the concentrations of the reactants and products reach a constant level? A) rate law B) rate constant C) equilibrium D) elementary process E) reversible reaction
2. Consider the reaction below between nitric oxide and hydrogen gas: 2 NO(g) + 2 H2(g) - N2 + 2 H2009) Upon being studied experimentally, it has been determined that the rate law expression for this reaction is first order in Hz and second order in NO(g). With this information in mind, answer the following: [Tip: You can assume that the steady-state approximation is valid for any intermediate here.) a. As written, is the reaction above a valid mechanism? In...
Physical Chemistry II
2. Hydrogen iodide can be synthesized from the elements in a gas-phase reaction. One proposed mechanism for the process is (20 pts) 1, 21(1" order) and E= 320kJ/mol ki k 21—1, (20 order) and E, = 440kJ/mol 21+H, → 2HI (36d order) and E, = 210kJ/mol Derive a differential rate law for the rate of production of HI if a) 1, and I are in equilibrium throughout the reaction (Rapid Equilibrium) b) Derive the differential rate law...
Q(1) During a chemical reaction, what defines when the concentrations of the reactants and products reach a constant level? A) Elementary process B) Rate constant C) Reversible reaction D) Equilibrium E) Rate law Q(2) Which is the correct equilibrium constant expression for the following reaction? FeO(s) + H2(g) - Fe(s) + H2O(g) A) Ke = [H2O] / [H2] B) Ke=[Fe][H2O] / [Fe2O3] [H2] C) Ke=[Fe) (H20] / [Fe2O3] D) Kc = [Hz] / [H2O] E) Ke= [Fe2O3] [H2] / [Fe][H2O]...
Problem 4: Horiuti-Polanyi Mechanism and Alkene Hydrogenation The hydrogenation of alkenes by heterogeneous catalysts has been studied for 80 years and has a mechanism that was proposed by Horiuti and Polanyi in 1934 which consists of 3 steps: i) alkene adsorption on the surface of the hydrogenated metal catalyst, ii) hydrogen migration to the beta- carbon of the alkene and finally ii) a reductive elimination of the free alkane Ki = k/k! k4 Assume that *, H*. C2H*, and C2Hs*...
ation. 7. Consider a collision-induced unimolecular decomposition reaction of the form A B+C. (a) Write down the three elementary steps in a Lindemann-Hinshelwood mechanism per- taining to such a decomposition reaction. (b) Use the steady-state approximation to obtain an expression for the rate of pro- duction of the products B and C, when the concentration of A is sufficiently high that (c) Express the rate you obtained in (b) in terms of the equilibrium constant pertain- ing to the activation...
The reaction between nitric oxide (nitrogen monoxide) and oxygen gives nitrogen dioxide according to the stoichiometric equation. 2 NO(g) 02(g)2 NO2(g) 1. Write the rate law expected if the reaction was found to occur in a single step The reaction is observed to be complex with the following mechanism is proposed: 2 NO N202 N202 2 NO N202 +02 → 2NO2 k2 kı k. -1 2. Use the steady state approximation to obtain the expression for the formation of NO2....
Problem 2) Experimentally, the reaction between compound A and iodine (l): A(aq) + 12(aq) - D(aq) + Hl(aq) is 1st order with respect to A, first order with respect to H+, and zero-th order with respect to lz. The following mechanism has been proposed: Step 1. A(aq) + H+(aq) + HA+(aq) Step 2. HA+(aq) → B(aq) + H+ (aq) Step 3. B(aq) + 12(aq) → D(aq) + Hl(aq) Find the rate law for the reaction if a) the second step...
2. If the reaction between iron(III) ion and thiocyanate ion yielded an equilibrium concentration of 0.30 M for each of these ions, what is the equilibrium concentration of the red iron(III)-thiocyanate complex? (Hint: The equilibrium constant for the reaction is in the Background section.) Show your work 3. In the reaction below, NH3(g) + H2O(1) - NH; +H30+ the equilibrium constant is 10-34. Is this reaction likely to take place? Explain your answer. iron(III) and thiocyanate ions, the equilibrium expression...
8. Write down a complete set of equations for the reaction diagram (16). [The first two equations are given in (17a, b) .] Show that equation (18) is obtained by making a quasi-steady-state assumption. . C. A QUICK, EASY DERIVATION OF SIGMOIDAL KINETICS One of the features of Michaelis-Menten kinetics not shared by more complex molecular pathways is that for low precursor concentrations it yields an approxi- mately linear rate of reaction. (The graph of -dc/dt versus c is almost...
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