If we assume a system with an anodic overpotential, the variation of n as a functionof current density:1. at low fields is linear 2. at higher fields, it follows Tafel's lawObtain the range of current densities for which the overpotential has the same valuewhen calculated for 1 and 2 cases (maximum relative difference of 5% compared tothe behavior for higher fields).To which overpotential range does this correspond?Data: i = 1.5 mA cm², T = 300°C, B = 0.64, R = 8.314 J K1 mol-1 and F = 96485 C mol-1.

Step 1:Given Data:Exchange current density, i0 = 1.5 mA cm-2Temperature T = 300 + 273 = 573 Kβ =…

Answered: If we assume a system with an anodic…

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter5: Signals And Noise

Section: Chapter Questions

Problem 5.8QAP

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An atomic beam is designed to function with (a) cadmium, (b) mercury. The source is an oven maintained at 380K with a small slit of dimensions 1.0cm x 1.0 x 10-3cm. The vapor pressure of cadmium is 0.13 Pa nd that of mercury is 12 Pa at this temperature. What is the atomic current (the number of atoms per second) in the beams?
The classical dissociation constant of propionic acid, C2H5CO2H, is 1.34 x10-5 moldm-3 at 250C and the limiting molar conductivities at zero concentration of hydrogen and propionate ions are 349.8 and 35.8 ohm-1 cm2 mol-1 respectively. Calculation of the resistivity of 0.100 M solution of propionic acid.
write a summary of each of the techniques for measuring vacancyconcentrations, noted therein. (1) Measurements of the quenched-in residual electricalresistivity of aluminium rapidly cooled from temperatures be-low about 800 K with initial quenching rates of 2 × 106 K s−1give the enthalpy of formation of monovacancies H F1V =(0.65 ± 0.01) eV.(2) Comparison of the quenching data with high-temperature differential-dilatometry data gives the monova-cancy formation entropy SF1V = (0.76 ± 0.4)kB (kB =Boltzmann’s constant) and the low-temperature resistivity perunit concentration of vacancies ρ1V = (1.9 ± 0.1) μm.(3) The binding enthalpy of divacancies in Al is H B2V =(0.17 5 ± 0.02 5) eV. This is in agreement with earlier ex-perimental determinations by Doyama and Koehler 48) and byLevy et al. 49, 50) but in marked contrast to the claim of Carlinget al., 23) based on computations with the generalized gradi-ent approximation, that in Al H B2V is zero or even negativeand therefore the…
Kindly answer no i, ii & iii
You will need the following data to do the calculations below. Parameter Eel Energy/cm-1 19735 VII 213.36 vx 0.14 v 122.31 vox E(I*) 0.883 7603 (a) Find the excited state dissociation energies, Do and Dé. In order to do this, you must find the convergence limit, max, which is the value where the excited state potential energy curve becomes asymptotic relative to the v" = 0 level. We can find this by taking the derivative of v with respect to order to solve for max. Referring to Figure 1, you can clearly see that + 1½), solving for (v' + 2)and substituting it back into equation (3) in max and Do = vmax - voo ve v'exé De = Dó + 2 4 (5) (6) (b) E(I*) is the energy difference between the dissociated I atoms from the ground state (I + I) and those from the excited state (I + I*) where I* indicates an I atom in the excited state (the result of energy being conserved upon dissociation). Using the data in Table 1 and the values that you calculated in part (a), calculate D" and Do" and the…
Explain Seebeck effect and discuss about neutral temperature and the temperature of inversion with examples.
The molar absorptivity constant for the red dye is constant at different wavelengths. O True O False
15.
Express a wavelength of 442 nm as (a) a frequency. (b) a wavenumber.
2. A one-particle, one-dimensional system has the state function y=(sinat) ()* e/² + (cosat) (32/C) 1/4 2 1/4 e-x²/² е πρ >-x2/c2 xe where a is a constant and c = 2.000 Å. If the particle's position is measured at t = 0, estimate the probability that the result will lie between 2.000 Å and 2.001 Å.
Use the data in Table 19D.1 for the exchange-current density and transfer coefficient for the reaction Fe3+ + e− → Fe2+ on platinum at 25 °C to identify the current density needed to obtain an overpotential of 0.30 V as calculated (i) by using the Butler–Volmer equation, and (ii) by assuming that the current is entirely anodic. Comment on the validity of the latter assumption.
Explain why small uncertainties in the measured potential of ISEs can cause large errors in the determined analyte concentration.

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