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3. If AH for the formation of Schottky defects in a certain MX crystal is 200...
This thermodynamic cycle describes the formation of an ionic compound MX from a metal element M...
This thermodynamic cycle describes the formation of an ionic compound MX from a metal element M and nonmetal element X in their standard states. Use it to answer the questions in the table below 900 800 700 600 + X enthalpy 400 300. 200. 100. 0. 100.- kJ/mol M3 What is the lattice enthalpy of MX? 1 kJ/mol What is the enthalpy of formation of MX?kJ/mol Suppose both the heat of sublimation of M and the electron affinity of X...
d. The main defect in stoichiometric Csl is the Schottky defect. The fraction of lattice sites...
d. The main defect in stoichiometric Csl is the Schottky defect. The fraction of lattice sites that exhibit Schottky defects, as a function of temperature, is as follows: 1.08 x 10-16 at 300 K, 1.06 x 10-12 at 400 K, 2.63 x 10-10 at 500 K, 1.04 x 10-8 at 600 K, 4.76 x 10-6 at 900 K. Show whether the formation of Schottky defects is given by an Arrhenius (or Boltzmann) expression and, if so, evaluate the enthalpy of...
4. [201 At 500 K, we have the data of standard enthalpy of formation and standard...
4. [201 At 500 K, we have the data of standard enthalpy of formation and standard entropy of formation as follows: AH° (kJ/mol) AfSe (J/K mol) Substance HI (g 32.41 221.63 Н2 (g) 5.88 145.64 I2 (g) 69.75 279.94 One mole of H2 and one mole of I2 are placed in a vessel at 500 K. At this temperature only gases are present and the equilibrium of the following reaction is established. Н2 (9) + I, (9) 2HI (g) (1)...
OADVANCED MATERIAL Interpreting a Born-Haber cycle This thermodynamic cycle describes the formati...
OADVANCED MATERIAL Interpreting a Born-Haber cycle This thermodynamic cycle describes the formation of an ionic compound M X2 from a metal element M and nonmetal element X in their standard states. Use it to answer the questions in the table below. 2+ 1100 1000 900 2- 800--- 700 600 M (8)+2X) 500. enthalpy 400 (kJ/mol) 300. M (g) + X, (g) 200 ▼ | 700,- 600 M (g) + 2x (g 500 enthalpy 400. 300. м (е) + x, (g)...
36. calculate the heat of formation of ammonium chloride, NH C1, in kJ/mol AH = -46.2...
36. calculate the heat of formation of ammonium chloride, NH C1, in kJ/mol AH = -46.2 kJ/mol AH° = -92.3 kJ/mol N,(9) + ŽH,(9) ► NH3(g) H2(g) + 301,(9) - HC1(g) NH3(g) + HC1(9) NH_C1(s) 3 N, (g) + 2H, (g) + 3 c1,(g) - NH,C1 (5) AH° = -176.0 kJ/mol AH = ? a. 314.5 b.-314.5 C.-38.0 d.-222 e. - 130
19. The standard enthalpy of formation for NH (g) is -46.1 kJmolCalculate AH for the reaction...
19. The standard enthalpy of formation for NH (g) is -46.1 kJmolCalculate AH for the reaction 2NH(g)N() 3H.() B 46.1 kJ (A) -92.2 kJ Di 922 kJ (C) 46.1 k 4. Calculate the change in enthalpy (in kJ per mole of CO) for the decomposition of sodium hydrogen carbonate from AH kJmol' NaHCO,(s) Na,CO,(s) H,O() CO (g) the standard enthalpies of formation: 2 NaHCO,(s) Na CO,(s)H0(g) -947.7 -1130.9 -241.8 -393.5 CO(e) (B -818.5 C -1766.2 (D) -3661.6 A 129.2 9....
3. (14 pts.) The standard molar enthalpy of formation of Fe,Oxs is AH = -8242 kJ/mol,...
3. (14 pts.) The standard molar enthalpy of formation of Fe,Oxs is AH = -8242 kJ/mol, and the standard molar enthalpy of formation of SO2(g) is AH = -296.8 kJ/mol (both at 298 K). Use this information, along with the standard molar enthalpy change of the following reaction at 298K, 2 FeS21s) + 11/2O2(g) → Fe2O3 + 4 SO2(g) AH = -1655 kJ/mol To determine the standard molar enthalpy change of the reaction shown below are 298 K: Fe(s) +...
#4.(25pts) Consider the reaction AH (kJ/mole) 5 CO2(g) + SizN() ----> 3 SiO(g) + 2 N2O(s)...
#4.(25pts) Consider the reaction AH (kJ/mole) 5 CO2(g) + SizN() ----> 3 SiO(g) + 2 N2O(s) + 5 CO(g) AH = 2023.75 kJ/mole (1) Use the above information as well as heat of formation data in the appendix of your textbook to calculate AH (Si,N.(s)) in kJ/mole. Additional information: AH (SiO(g)) = 1.94 x 109 kJ/mole 6) How many kJ of heat are absorbed when 1.2 lbs of Si N.(s) react according to the above equation? 1 lb = 453.6...
Biased Si p-n junction (a) An abrupt Si p-n junction (Schottky model) of square cross section with area of 1x10-4 cm* has the following properties at 300 K: side Na - 1x1017 cm3 n side Na=1x1015 -3 c...
Biased Si p-n junction (a) An abrupt Si p-n junction (Schottky model) of square cross section with area of 1x10-4 cm* has the following properties at 300 K: side Na - 1x1017 cm3 n side Na=1x1015 -3 cim =10us 200 cm 2/Vs) In 700 cm2/(Vs) In = 1300 cm 2/(Vs - 450 cm/(Vs) The junction is forward biased by 0.5 V. What is the forward current? (b) What is the current at a reverse bias of-0.5 V?
Biased Si p-n...
.. Fe is identified by the rapid formation of the intensely colored pentaaquathio-cyanatoiron (III) complex ion,...
.. Fe is identified by the rapid formation of the intensely colored pentaaquathio-cyanatoiron (III) complex ion, [Fe(H,O),SCN , which forms when tiocyante, SCN, is added to a solution containing heaaquairon (III), [Fe(H,0).J. Use the information and diagram to answer the following questions: Absorbance 300 400 500 600 700 Wavelength (nm) FIGURE a Absorption Spectrum of [Fe(H20),SCN)2+ A Molecular Approach 4le Tro a) Determine the color of the aqueous solution of [Fe(HO),SCN b) Calculate the crystal field splitting energy of [Fe(H,0),SCN]...
This thermodynamic cycle describes the formation of an ionic compound MX from a metal element M and nonmetal element X in their standard states. Use it to answer the questions in the table below 900 800 700 600 + X enthalpy 400 300. 200. 100. 0. 100.- kJ/mol M3 What is the lattice enthalpy of MX? 1 kJ/mol What is the enthalpy of formation of MX?kJ/mol Suppose both the heat of sublimation of M and the electron affinity of X...
d. The main defect in stoichiometric Csl is the Schottky defect. The fraction of lattice sites that exhibit Schottky defects, as a function of temperature, is as follows: 1.08 x 10-16 at 300 K, 1.06 x 10-12 at 400 K, 2.63 x 10-10 at 500 K, 1.04 x 10-8 at 600 K, 4.76 x 10-6 at 900 K. Show whether the formation of Schottky defects is given by an Arrhenius (or Boltzmann) expression and, if so, evaluate the enthalpy of...
4. [201 At 500 K, we have the data of standard enthalpy of formation and standard entropy of formation as follows: AH° (kJ/mol) AfSe (J/K mol) Substance HI (g 32.41 221.63 Н2 (g) 5.88 145.64 I2 (g) 69.75 279.94 One mole of H2 and one mole of I2 are placed in a vessel at 500 K. At this temperature only gases are present and the equilibrium of the following reaction is established. Н2 (9) + I, (9) 2HI (g) (1)...
OADVANCED MATERIAL Interpreting a Born-Haber cycle This thermodynamic cycle describes the formation of an ionic compound M X2 from a metal element M and nonmetal element X in their standard states. Use it to answer the questions in the table below. 2+ 1100 1000 900 2- 800--- 700 600 M (8)+2X) 500. enthalpy 400 (kJ/mol) 300. M (g) + X, (g) 200 ▼ | 700,- 600 M (g) + 2x (g 500 enthalpy 400. 300. м (е) + x, (g)...
36. calculate the heat of formation of ammonium chloride, NH C1, in kJ/mol AH = -46.2 kJ/mol AH° = -92.3 kJ/mol N,(9) + ŽH,(9) ► NH3(g) H2(g) + 301,(9) - HC1(g) NH3(g) + HC1(9) NH_C1(s) 3 N, (g) + 2H, (g) + 3 c1,(g) - NH,C1 (5) AH° = -176.0 kJ/mol AH = ? a. 314.5 b.-314.5 C.-38.0 d.-222 e. - 130
19. The standard enthalpy of formation for NH (g) is -46.1 kJmolCalculate AH for the reaction 2NH(g)N() 3H.() B 46.1 kJ (A) -92.2 kJ Di 922 kJ (C) 46.1 k 4. Calculate the change in enthalpy (in kJ per mole of CO) for the decomposition of sodium hydrogen carbonate from AH kJmol' NaHCO,(s) Na,CO,(s) H,O() CO (g) the standard enthalpies of formation: 2 NaHCO,(s) Na CO,(s)H0(g) -947.7 -1130.9 -241.8 -393.5 CO(e) (B -818.5 C -1766.2 (D) -3661.6 A 129.2 9....
3. (14 pts.) The standard molar enthalpy of formation of Fe,Oxs is AH = -8242 kJ/mol, and the standard molar enthalpy of formation of SO2(g) is AH = -296.8 kJ/mol (both at 298 K). Use this information, along with the standard molar enthalpy change of the following reaction at 298K, 2 FeS21s) + 11/2O2(g) → Fe2O3 + 4 SO2(g) AH = -1655 kJ/mol To determine the standard molar enthalpy change of the reaction shown below are 298 K: Fe(s) +...
#4.(25pts) Consider the reaction AH (kJ/mole) 5 CO2(g) + SizN() ----> 3 SiO(g) + 2 N2O(s) + 5 CO(g) AH = 2023.75 kJ/mole (1) Use the above information as well as heat of formation data in the appendix of your textbook to calculate AH (Si,N.(s)) in kJ/mole. Additional information: AH (SiO(g)) = 1.94 x 109 kJ/mole 6) How many kJ of heat are absorbed when 1.2 lbs of Si N.(s) react according to the above equation? 1 lb = 453.6...
Biased Si p-n junction (a) An abrupt Si p-n junction (Schottky model) of square cross section with area of 1x10-4 cm* has the following properties at 300 K: side Na - 1x1017 cm3 n side Na=1x1015 -3 cim =10us 200 cm 2/Vs) In 700 cm2/(Vs) In = 1300 cm 2/(Vs - 450 cm/(Vs) The junction is forward biased by 0.5 V. What is the forward current? (b) What is the current at a reverse bias of-0.5 V?
Biased Si p-n...
.. Fe is identified by the rapid formation of the intensely colored pentaaquathio-cyanatoiron (III) complex ion, [Fe(H,O),SCN , which forms when tiocyante, SCN, is added to a solution containing heaaquairon (III), [Fe(H,0).J. Use the information and diagram to answer the following questions: Absorbance 300 400 500 600 700 Wavelength (nm) FIGURE a Absorption Spectrum of [Fe(H20),SCN)2+ A Molecular Approach 4le Tro a) Determine the color of the aqueous solution of [Fe(HO),SCN b) Calculate the crystal field splitting energy of [Fe(H,0),SCN]...
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