Calculate the ionization energy (in kJ/mol) of the Li²+ ion. Hint: Use the Bohr equation. Enter only your numerical answer. Do not enter units.
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- Consider a hypothetical ionic compound AB (comprised of A* and B ions). Given the following enthalpy data and using a Born-Haber cycle calculation, predict AHiattice in kJ mol. AG) + Bs) - AB 4H = -384 kJ mol As) → Ag) ArH = 105 kJ mol B(s) - Bg) A,H = 101 kJ mol1 First ionization energy of Ag) = 501 kJ mol" Answes=? Electron affinity enthalpy of Bro (exothermic) = -348 kJ molCalculate the lattice energy of NaBr(s), given the following thermochemical equations, where A/E and AEA are ionization energy and electron affinity, respectively. Na(s)Na(g) AH = +107 kJ Na(g) Nat(g) + e A/E = +496 kJ -> 1/2 Br₂(g) → Br(g) AHf = +112 kJ - Br(g) + e¯ → Br¯(g) AEA = -325 kJ Na(s) + 1/2 Br₂(g) → NaBr(s) AH = -361 kJ ->> - -1401 kJ -751 kJ +29 kJ -29 kJ +751 kJThe lattice energy of potassium iodide is the energy required for the following reaction. KI(s) → K+(g) + I−(g) ΔHrxn = ΔHlattice Use the Born-Haber cycle to calculate ΔHlattice for KI(s) from the information given below. Equation 1: 2 K(s) + I2(g) → 2 KI(s) ΔH1 = −655 kJ/mol Equation 2: K(s) → K(g) ΔH2 = 89 kJ/mol Equation 3: I2(g) → 2 I(g) ΔH3 = 214 kJ/mol Equation 4: K(g) → K+(g) + e− ΔH4 = 419 kJ/mol Equation 5: I(g) + e− → I−(g) ΔH5 = −294 kJ/mol
- 3. Write a chemical equation corresponding to the second ionization energy of calcium.Why does Li form a positive ion, Li+, whereas Br forms a negative ion, Br-?g 44.956 mol atomic mass electronegativity 1.36 kJ 18.1 mol electron affinity kJ 633.1 mol ionization energy kJ 16. mol heat of fusion Does the following reaction absorb or release energy? O release O absorb (1) Sc(g) + e Sc (g) O Can't be decided with the data given. Is it possible to calculate the amount of energy absorbed or released by reaction (1) using only the data above? O yes O no If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (1): O kJ/mol Does the following reaction absorb or release energy? O release O absorb (2) Sc (g) - Sc (g) + e O Can't be decided with the data given. Is it possible to calculate the amount of energy absorbed or released by reaction (2) using only the data above? O yes O no If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (2): O kJ/mol
- Using Coulomb's law to predict trends in lattice energy: E = kQ1Q2 / r ∝ QcatQan / IRcat + IRan Which of the following would you expect to have the largest lattice energy? LiCl NaF MgCl2 MgBr2 CaCl2How do Group VIA elements form ions? A) They lose protons B) They gain two protons C) They lose two electrons D) They gain two electrons Which substance consists of anions and cations? A) CaF2, Calcium Fluoride B) Br2, Bromine C) Ag, Silver D) SiO2, Silicon Dioxide A newly discovered element is assigned to Group VIIA (Group 7A) in the periodic table. What charge will ions of this new element have? A) 1- B) 2- C) 1+ D) 2+ Reactions occur when atoms, ions or molecules collide. In a reaction between magnesium and bromine atoms, how many atoms of bromine will react per atom of magnesium? A) 1 B) 2 C) 3 D) 4 Which compound exists as a solid crystal lattice of cations and anions at room temperature? A) BrCl B) CaCl2 C) SCl2 D) SiCl4Consider the following data for yttrium: atomic mass electronegativity electron affinity ionization energy heat of fusion 88.906 1.22 29.6 600. g mol 11.4 Explanation kJ mol Check kJ mol You may find additional useful data in the ALEKS Data tab. kJ mol Does the following reaction absorb or release energy? (1) Y (g) → Y(g) + e Is it possible to calculate the amount of energy absorbed or released by reaction (1) using only the data above? If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (1): Does the following reaction absorb or release energy? (2) Y(g) + e Y (g) Is it possible to calculate the amount of energy absorbed or released by reaction (2) using only the data above? If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (2): Q Search release absorb O Can't be decided with the data given. O yes no kJ/mol O release absorb O Can't be decided with the data given. yes no kJ/mol…
- Consider the following data for nickel: atomic mass electronegativity electron affinity ionization energy heat of fusion 58.693 1.91 112. 737.1 g mol 17.2 kJ mol kJ mol kJ mol Does the following reaction absorb or release energy? (1) Ni (g) → Ni(g) + e Is it possible to calculate the amount of energy absorbed or released by reaction (1) using only the data above? If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (1): Does the following reaction absorb or release energy? (2) Ni' (g) + e Ni (g) - Is it possible to calculate the amount of energy absorbed or released by reaction (2) using only the data above? If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (2): Orelease O absorb O Can't be decided with the data given. O yes O no kJ/mol O release O absorb O Can't be decided with the data given. O yes O no kJ/molGiven the following information: Li(s) → Li(g) Li(s) = 161 kJ/mol Heat of sublimation of HCI(g) → H(g) + Cl(g) Bond energy of HCI = 427 kJ/mol Li(g) → Li+(g) + e- lonization energy of Li(g) = 520. kJ/mol CI(g) + e- → CI-(g) Electron affinity of Cl(g) = -349 kJ/mol Li+(g) + Cl-(g) →→ LiC(s) Lattice energy of LİCI(s) = -829 kJ/mol H2(g) → 2H(g) Bond energy of H2 = 432 kJ/mol calculate the net change in energy for the reaction 2Li(s) + 2HCI(g) → 2LİCI(s) + H2(g) -179 kJ 362 kJ -70 kJ -572 kJ None eseConsider the following data for bromine: atomic mass electronegativity electron affinity ionization energy heat of fusion 79.904 324.6 2.96 1139.9 5.8 g mol + (1) Br (g) + e → Br(g) kJ mol kJ mol You may find additional useful data in the ALEKS Data tab. kJ mol Does the following reaction absorb or release energy? 2+ + (2) Br²¹ (g) + e → Br (g) Is it possible to calculate the amount of energy absorbed or released by reaction (1) using only the data above? If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (1): Does the following reaction absorb or release energy? Is it possible to calculate the amount of energy absorbed or released by reaction (2) using only the data above? If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (2): release absorb Can't be decided with the data given. yes no kJ/mol release absorb Can't be decided with the data given. yes no kJ/mol ? 000 18 Ar
