Calculate the activation energy, in kJ/mol, for the redox reaction Sn2+ + 2C03+ Sn4+ + 2Co2+ ----> T('C) k (M-15-1) 4 3.12 x 103 26 29.0 x 103 A. -69.7 B. 70.0 C. 0.689 D. 69.7 E. answer not listed O F. 59.2 G. -70.0 O H. -0.689
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- Two points that lie on the line of best fit for a ln k versus 1/T graph are (0.00452, -2.93) and (0.00700, -5.31). What is the activation energy in kJ/mol?For the reduction 2FeCl3 + SnCl2 =====➔ 2 FeCl2 + SnCl4 in aqueous solution the following data were obtained at 25oC t(min) 1 3 7 11 40 Y 0.01434 0.02664 0.03612 0.04102 0.05058 Where y is the amount of FeCl3 reacted in moles per liter. The initial concentrations of SnCl3 and FeCl3 were respectively, 0.03125, 0.0625 moles/L. a.)Show that the reaction is third order (derive the rate law), and b.) calculate the average specific rate constant.For the reaction NH2SO2OH + H2O → NH4HSO4 In aqueous solution at 80.35oC, the following constants were observed at the indicated ionic strength μ x103 k (L/mol hr) 5.06 1.07 11.21 1.02 15.85 0.976 22.94 0.886 From these data ascertain: a.) the valence of the reacting ions and b.) the rate constant for the primary salt effect.
- Suppose that something had gone wrong in the Big Bang, and instead of ord inary hydrogen there was an abundance of deuterium in the universe . There would be many subtle changes in equilibria, particularly the deuteron transfer equilibria of heavy atoms and bases. The Kw for D2O, heavy water, at 25 °C is 1.35 x 10-15. (a) Write the chemical equation for the autoprotolysis (more precisely, autodeuterolysis) of D2O. (b) Evaluate pKw for D2O at 25 ° C. (c) Calculate the molar concentrations of D3O+ and OD- in neutral heavy water at 25 °C . (d) Evaluate the pD and pOD of neutral heavy water at 25 °C. (e) Formulate the relation between pD, pOD, andpKw(D2O).Write down the defect chemistry equationfor introduction of SrTiO3 in BaTiO3using the Kröger-Vink notation.In the adsorption of a certain solute, from an aqueous solution on activated carbon at 21°C, the Freundlich constants are n=2.319 and K=0.702 when the equilibrium concentration c is expressed in mol/L a) If 0.1186 g. of this solute is adsorbed on 0.5017 g. of activated carbon at 21°C, find c b) Find the molar mass of solute adsorbed from 0.05 L of a solution whose initial concentration is 0.120 M.
- The pseudofirst-order rate constant for the decomposition of urea, CO(NH2)(aq) + 2 H2O(I)→ 2 NH4+(aq) + CO32-(aq). is 1.2 x 10-7 s- 1 at 60 °C and 4.6 x 10-7 s-1 at 70 oc. Estimate (a) the activation Gibbs energy and (b) the entropy of activa tion of the reaction.Consider the reaction Mn+ + ne- ⇌ M. If ΔG*c = ΔG* + (1-α)nFE and η = E – Eeq, prove that ic = io exp[-(1-α)nFηa)/RT)].Potassium dichromate has several industrial applications. To determine the purity of the salt that will be used in different industrial processes, a sample mass equal to 2.660 g was dissolved and quantitatively transferred to a 500.00 mL flask. An aliquot of 25.00 mL of this solution was treated with excess KI and the released iodine was titrated with 0.1000 mol L-1 sodium thiosulfate, spending 27.00 mL. Calculate the purity of the analyzed salt. Data:K = 39.10 O = 16.00 Cr = 52.00 I = 126.9 S = 32.07
- kindly help me with this problem thank you 2. The following data are for Xenon adsorption on ZSM5 zeolite. Evaluate the constants from thea) Langmuir and b) Freundlich. Which of the isotherm fit the data best? Explain. P(Torr) 47 136 250 364 473 577 680 mass(g) of ZSM5 zeolite/mole of Xenon 1.8832 0.8977 0.6588 0.5692 0.5255 0.4946 0.4715Benzene on graphite follows the Langmuir isotherm. At a pressure of 1 atm, theThe volume of benzene adsorbed on a sample of graphite was 4.2 mm3 atconditions T = 0°C and 1 atm. At 3 atm it was 8.5 mm3. Suppose 1 molecule ofbenzene occupies 30Å and estimate the surface area of graphite.A student graphed lnk vs. 1/T and found the slope to be -6500. If R is 8.314 J K-1 mole-1, then the activation energy in kJ/mole is?