What is the equilibrium number of vacancies, per cubic metre, for copper at 628 °C.Given:Activation energy per vacancy = 0.8 eV/atomAtomic weight of copper = 58.5 g/mol and density at the given temperature is 8.40 g/cm³Boltzmann's constant kg= 1.38×10-23 J/atom.K = 8.62x10-5 eV/atom.KYour answer should be in scientific notation with 5 significant figures. The following example shows the format in which you should inputyour answer: 1.2475e8.Useful formulae:NAAdensity (p) =V.Nawhere Avagadro's number Na= 6.022 x 1025 atoms/molNpQv= expkBT

Recall the given expression as follows NvNA=exp-QvKBTHere, equilibrium number of…

Answered: What is the equilibrium number of…

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter18: Chemical Kinetics

Section: Chapter Questions

Problem 65AP

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Differential EQN: Bruce Wayne analyzes a kryptonite in order to prepare if ever Clark Kent becomes rogue. The former studieda kryptonite and found that it decomposes at a rate proportional to the quantity of kryptonite present.Suppose that it is found that in 25 years approximately 1.1% of a certain quantity of kryptonite hasdecomposed. Determine how long it will take until 50% of the original amount of kryptonite dissipates. pls. provide complete solution with explenation. the formula we use is : dx/dt=kx
hello, i sent this question before but the answer you rpovided for both wasnt right and i couldnt undertstand how you got the answer. can you please show me a handwritten solution for better understanding. 1a) The decomposition of ethanol at some constant temperature (above 500°C), over a copper surface, C2H5OH(g) CH3CHO(g) + H2(g) was studied by monitoring the total pressure with time.The following data were obtained: t (s) Ptotal (torr) 0 120 45 131 139 154 233 177 376 212 380 213 What will be the total pressure at t = 462 s? 1b) What is the rate constant (k)?(Include appropriate units.)
A metal has a certain fraction f = 10-5 of vacancies at the atomic level at finite temperatures. If the activation energy for vacancy formation was increased by 50%, what would be the new vacancy concentration? a. 5.48E-4 b. 6.22 E-5 c. 1.24E-6 d. 7.43E-10 e. 3.16E-8
A metal has a certain fraction f = 10-5 of vacancies at the atomic level at finite temperatures. If the activation energy for vacancy formation was increased by 50%, what would be the new vacancy concentration? Select one: a. 3.16E-8 b. 5.48E-4 c. 6.22 E-5 d. 1.24E-6 e. 7.43E-10
Distinguish between a first-order phase transition, a second-order phase transition, and a λ-transition at both molecular and macroscopic levels.
The desorption (leaving of the surface) of a single molecular layer of n-butane from a single crystal of aluminum oxide is found to be first order with a rate constant of 0.128>s at 150 K.a. What is the half-life of the desorption reaction?b. If the surface is initially completely covered with n-butane at 150 K, how long will it take for 25% of the molecules to desorb (leave the surface)? For 50% to desorb?c. If the surface is initially completely covered, what fraction will remain covered after 10 s? After 20 s?
Write the difference between order and molecularity of reaction.
Use the following data to determine the value of k at 350 K. Time (s) [ClO] (molecules/cm3) 0 2.08 x 105 1 8.64 x 104 2 5.46 x 104 3 3.99 x 104 Use the data above to determine the value of the half-life at 350 K. s
The first step in the heterogeneoushydrogenation of ethylene is adsorption of theethylene molecule on a metal surface. One proposed explanation for the “sticking” of ethylene to a metalsurface is the interaction of the electrons in the C—C π bond with vacant orbitals on the metal surface. (a) If thisnotion is correct, would ethane be expected to adsorb to a metal surface, and, if so, how strongly would ethane bindcompared to ethylene? (b) Based on its Lewis structure,would you expect ammonia to adsorb to a metal surfaceusing a similar explanation as for ethylene?
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.
Draw a Langmuir isotherm and properly label the axes! Write down the equation defining the isotherm and identify the symbols in it! What conditions must be satisfied for the equation top be valid?
The following is a quote from an article in the August 18,1998, issue of The New York Times about the breakdown ofcellulose and starch: “A drop of 18 degrees Fahrenheit [from77 °F to 59 °F4 lowers the reaction rate six times; a 36-degreedrop [from 77 °F to 41°F] produces a fortyfold decrease inthe rate.” (a) Calculate activation energies for the breakdownprocess based on the two estimates of the effect of temperatureon rate. Are the values consistent? (b) Assuming thevalue of Ea calculated from the 36° drop and that the rate ofbreakdown is first order with a half-life at 25 °C of 2.7 yr, calculatethe half-life for breakdown at a temperature of -15 °C.

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