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…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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1. The concept of gas collisions can be applied to the study of metrology. Being the highest composition in atmospheric air (78% by volume), N2 has a collision diameter of 0.369 x 10° m. At 298 K and 1 atm, calculate the single collision frequency of N2 at sea level. The collision frequency of N2 decreases at higher altitude. At 11 km from the sea level, the collision frequency is 3.16 x 10° s-1. Calculate the pressure of the gas at this altitude (T = – 220 K). Determine the mean free path for N2 at the altitude of 11 km (the altitude similar in Question 1.ii.) i. ii. i.
Consider the equilibrium system described by the chemical reactionbelow. Calculate the value of Qc for the initial set reaction conditions in3.00 L container:8.65 g C2H4, 11.2 g O2, and 5.68 g CH3CHO. 2 C2H4(g) + O2(g) = 2 CH3CHO(g)
2) What is true about the relationship of Kp and Kc for the reaction: 2 CH4(g) + 3 02(g) = 2 CO(g) + 4 H20(g)? A) Kp Kc D) Kp and Kc are not related. 3) Phosphorus pentachloride decomposes to phosphorus trichloride and chlorine gas at elevated temperatures by the following reaction: PC15(g) = PC13(g) + Cl2(g). If Kc = 1.8 at 250°C, what is the value of Kp at the same temperature? A) 4.2 x 10-2 B) 8.8 × 10-2 %3D C) 65 D) 77 4) At a certain temperature, bromine and nitric oxide react to form nitrosyl bromide: Br2(g)+ 2 NO(g)=2 NOBI(g). When initial amounts of Br2, NO, and NOBr are mixed, the concentration of NOBR increases. Which statement below is true? A) KcQ C) Kc =Q D) More information is needed to make a statement about Ke.
The equilibrium constant in terms of pressures, Kp, for the reaction NH3(g) + HCl(g) 2NH4CI(S) at 340 °C is 4.00. (a) If the partial pressure of ammonia is PNH3 = 0.840 atm and solid ammonium chloride is present, what is the equilibrium partial pressure of hydrogen chloride at 340 °C? PHCI = (b) An excess of solid NH4Cl is added to a container filled with NH3 at 340 °C and a pressure of 1.34 atm. Calculate the pressures of NH3(9) and HCI(g) reached at equilibrium. PNH3 = atm PHCI = atm atm
The equilibrium constant in terms of pressures for the reduction of tungsten (VI) oxide to tungsten at 25 °C is Kp = 21.1, corresponding to the reaction WO3(s) + 3CO(g) W(s) + 3C0₂(9) If the total pressure of an equilibrium system at 25 °C is 2.96 atm, calculate the partial pressures of CO(g) and CO₂(9). Pco = PCO₂ atm atm
15 16 17 18 19 20 21 22 23 24 = 25 26 Hydrogen chloride and oxygen react to form water and chlorine, líke this: 4HCI(g)+0,(g) → 2H,0(g)+2C,(g) Suppose a mixture of HCI, O2, H,0 and Cl, has come to equilibrium in a closed reaction vessel. Predict what change, if any, the perturbations in the table below will cause in the composition of the mixture in the vessel. Also decide whether the equilibrium shifts to the right or left. perturbation change in composition shift in equilibrium O to the right The pressure of O, will O to the left Some HCI is removed. The pressure of H2O will O (none) O to the right The pressure of HCI will O to the left Some H,0 is added. The pressure of O, will O (none) go up. go down. not change. Submit Continue MacBook Air
The white powder of LiHCO3 is unstable and when heated the following reaction occurs: 2LiHCO3(s) → Li2CO3(s) + H2O(g) + CO2(g) A student performed a controlled experiment in which he heated 2.3 grams of LiHCO3 powder and collected the gases into a 1.4-liter container. At the end of the reaction the temperature in the tank was 350 ° C 1.a. Calculate how many grams of Li2CO3 were obtained at the end of the reaction. 1. b. Calculate the tank pressure at the end of the reaction. 1.c. Calculate the partial pressure of CO2 in the tank at the end of the reaction. 2. Answer the following questions for the reactants: CO2, H2O, Li2CO3, LiHCO3 a. Determine which of them has the weakest intermolecular forces. b. Determine which of the substances is a molecular substance with a constant dipole. c. Determine the systematic name for the ionic substances.
A mixture of 0.03538 mol of O2, 0.03149 mol of NOCI, 0.06714 mol of NO2, and 0.02565 mol of Cl2 is placed in a 1.0-L steel pressure vessel at 1377 K. The following equilibrium is established: 1 02(g) + 2 NOCI((g) 2 NO2(g) + 1 Cl2(g) At equilibrium 0.01983 mol of C12 is found in the reaction mixture. (a) Calculate the equilibrium partial pressures of O2, NOCI, NO2, and C12. Peq(02) = Peq(NOCI) = . Peq(NO2) = . Peq(CI2) = . (b) Calculate KP for this reaction. KP =
15 16 17 18 19 20 21 22 23 24 = 25 26 Nitrogen monoxide and ozone react to form nitrogen dioxide and oxygen, like this: NO(g)+O3(g) NO2(g)+O2(g) The reaction is exothermic. Suppose a mixture of NO, O2, NO, and O, has come to equilibrium in a closed reaction vessel. Predict what change, if any, the perturbations in the table below will cause in the composition of the mixture in the vessel. Also decide whether the equilibrium shifts to the right or left. perturbation change in composition shift in equilibrium O to the right O to the left The temperature is raised. The pressure of NO will O (none) O to the right O to the left The temperature is lowered. The pressure of O2 will v? O (none) go up. go down. not change. Submit Assignment Continue MacBook Air
For a particular reaction at 298 К., Кр 3.445 x 10^-3. When the same reaction is re-run at a lower temperature (155 K), Kp = 1.690 x 10^-5. The reaction is ................ a)endothermic exothermic atequilibrium complete .
Methane and hydrogen sulfide react to form carbon disulfide and hydrogen, like this: CH,(2)+2H,S(2) - cs,(2)+4H,(e) Suppose a mixture of CH, H,S, CS, and H, has come to equilibrium in a closed reaction vessel. Predict what change, if any, the perturbations in the table below will cause in the composition of the mixture in the vessel. Also decide whether the equilibrium shifts to the right or left. th perturbation change in composition shift in equilibrium to the right The pressure of s will Some C, is added, to the left The pressure of CS, wil (nene) to the nght The pressure of CH, will to the len Some il, s removed, The pressure of H,A will (none)
Consider the equilibrium system described by the chemical reaction below. Calculate the value of Qc for the initial set reaction conditions in 3.00 L container: 8.65 g C2H4, 11.2 g O2, and 5.68 g CH;CHO. 2 C2H4(g) + O2(g) = 2 CH;CHO(g) 1 Based on the given data, set up the expression for Qc and then evaluate it. Do not combine or simplify terms.

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