What is the activation energy in kJ/mol of the diffusion of Mg into Al when its D0 = 1.2 x 10-4 and its diffusion coefficient at 500°C is 1.9 x 10-13

The adsorption of a certain substance, X, follows a Langmuir isotherm. Saturation coverage of the materials is 8 × 10-¹0 mol/cm² and 3 = 5 × 107 cm³/mol (assuming a₁ = C₁). At what concentration of X will the electrode surface be half covered (i.e., = 0.5)? Sketch the adsorption isotherm of the substance.

Plot (x/m) versus P for the Freundlich adsorption isotherm Describe how does Freundlich isotherm varies at high pressure and low pressure conditions?

7.5 micromoles ( u mol) of carbon dioxide are adsorbed onto a 1.0 gram sample of activated carbon. How many milligrams of CO2 were adsorbed?

52-56. For the reaction 2N,O5(g) → 4NO,(g) + O2(g), the following data were collected: t (minutes) [N,O;] (mol/L) 1.24 x 10-2 10. 0.92 x 10-2 20. 0.68 x 10-2 30. 0.50 x 10-2 40. 0.37 x 10-2 50. 0.28 x 10-2 70. 0.15 x 10-2 52. The order of this reaction in N,O, is a) 0 b) c) 2 d) 3 1 none of these

Calculate the fraction of aluminum lattice sites vacant at 660°C if the fraction at 400°C is 2.29x10-5.  Given  vacancy activation or formation energy, Qv= 0.76 eV/atom

Electrochemical Equilibria: Electrolytic DepositionOlympic gold medals are plated with gold rather than being pure gold. A minimum of 6 grams of gold (MW = 196.97 g/mol) and at least one gram of silver (MW = 196.97 g/mol) must be present in an Olympic gold medal.Silver content is 92.5 percent. A total of 340 gold medals were awarded at the Tokyo Olympics in 2021 to  athletes who are deserving Assume each medal is made by coating a 60-mm diameter, 3-mm thick, gold-free silver disc with a gold-free coating.  Determine the alloying of a disk with gold via electrolytic deposition using a gold (III) solution. following: a) Time in hours required to finish plating all gold medals used in the Tokyo Olympics  If the available electricity source can deliver 50 current in amperes, the Olympics will have a minimum gold content.

6. Adsorption of hydrogen gas over palladium surface obey Freundlich's adsorption isotherm, as shown in the graph. What is the mass (in g) of hydrogen gas adsorbed on the surface of 1.0 g palladium at a pressure of 8.1 x 10³ atm? logio m tane = 0.25 1.0 logio

What are all the possible ways activated carbon can be modified in its adsorption capacity?

2. The investigation of the reaction represented by the equation: X (g) + Y (g) → Z (g), allowed to establish that the reactive cross-section in this reaction at 25.0 °C was 7.50 × 10-2¹m². This was possible when comparing the experimental Arrhenius factor with the one predicted using collision theory. It is also known that the collision cross- sections of X and Y, estimated from their transport properties, are 0.95 nm² and 0.65 nm², respectively. a) If the masses are 15.5 amu and 21.7 amu for X and Y, respectively, and the rate constant is 5.25 mM-¹ s-¹, determine the activation energy of this reaction. b) If the steric factor in this reaction is assumed to be 1, by how much would the reaction rate increase?