Calculate the overall energy change in kilojoules per mole for the formation of CsF(s) from its elements using the following data:
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- Calculate the lattice energy of potassium fluoride, KF, using the BornHaber cycle. Use thermodynamic data from Appendix C to obtain the enthalpy changes for each step. (Note: You will obtain a slightly different answer if you use values given in Chapter 8 for the ionization energy and electron affinity, which are energy values at 0 K rather than the enthalpy changes at 298 K.)arrow_forwardFor which of the following substances is the least energy required to convert one mole of the solid into separate ions? (a) MgO (b) SrO (c) KF (d) CsF (e) MgF2arrow_forwardOf the five elements Sn, Si, Sb, O, Te, which has the most endothermic reaction? (E represents an atom.) What name is given to the energy for the reaction? E(g)E+(g)+earrow_forward
- Given the following enthalpy values for Na and Cl, calculate the lattice energy of NaCl using the Born- Haber cycle. for Na = 107.5 kJ/mole for Na = 495.8 kJ/mole for Cl, = 242.6 kJ/mole AHO sublimation AH ionization energy AHO dissociation energy ΔΗΡ electron affinity TOr Cl, = -348.6 kJ/mole AH formation for NaCl(s) = -4l1.2 kJ/molearrow_forward1) Calculate the lattice energy for NaCl(s) using a Born-Haber cycle and the following information: NaCl(s) → Nat(g) + Cl-(g) Na(s) + 1/2 C12(g) → NaCl(s) Na(s) → Na(g) Na(g) → Na+(g) + e- 1/2 C12(g) → Cl(g) Cl(g) + e- → Cl-(g) ? -411.0 kJ/mol +107.3 kJ/mol +495.8 kJ/mol +121.7 kJ/mol -348.6 kJ/molarrow_forwardConsider an ionic compound, MX, composed of generic metal M and generic, gaseous halogen X. • The enthalpy of formation of MX is AH; -517 kJ/mol. • The enthalpy of sublimation of M is AH sub = 141 kJ/mol. • The ionization energy of M is IE = 449 kJ/mol. • The electron affinity of X is AHEA = -323 kJ/mol. (Refer to the hint). • The bond energy of X, is BE = 217 kJ/mol. Determine the lattice energy of MX. AHjattice kJ/molarrow_forward
- Consider an ionic compound, MX3, composed of generic metal M and generic gaseous halogen X. The enthalpy of formation of MX3 is Δ?∘f=−925 kJ/mol. The enthalpy of sublimation of M is Δ?sub=175 kJ/mol. The first, second, and third ionization energies of M are IE1=579 kJ/mol, IE2=1677 kJ/mol, and IE3=2479 kJ/mol. The electron affinity of X is Δ?EA=−369 kJ/mol. (Refer to the hint). The bond energy of X2 is BE=179 kJ/mol. Determine the lattice energy of MX3.arrow_forwardConsider the following information. • The lattice energy of RbCl is AHjattice = -689 kJ/mol. t • The enthalpy of sublimation of Rb is AHsub = 80.9 kJ/mol. • The first ionization energy of Rb is IE, 403 kJ/mol. • The electron affinity of Cl is AHEA = -349 kJ/mol. • The bond energy of Cl, is BE = 243 kJ/mol. Determine the enthalpy of formation, AHf, for RbCl(s). AHf = kJ/molarrow_forwardUse the data provided below to calculate the lattice energy of RbCl. Is this value greater or less than thelattice energy of NaCl? Explain.Electron affinity of Cl = –349 kJ/mol1st ionization energy of Rb = 403 kJ/molBond energy of Cl2 = 242 kJ/molSublimation energy of Rb = 86.5 kJ/molΔHf [RbCl (s)] = –430.5 kJ/molarrow_forward
- Consider the following data for tungsten: atomic mass electronegativity electron affinity ionization energy heat of fusion 183.84 2.36 78.6 (2) W (g) + e 770. 1 35. g 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+ (1) W²(g) + e w (g) kJ mol Is it possible to calculate the amount of energy absorbed or released by reaction (1) using only the data above? w (g) 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. O yes no kJ/mol release absorb Can't be decided with the data given. yes no kJ/molarrow_forwardWhat is the chemical formula for the compound formed between manganese(IV) and chlorine? chemical formula: What is the chemical formula for the compound formed between manganese(IV) and sulfur? chemical formula:arrow_forwardThe 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/molarrow_forward
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