Item 9 Consider the Born-Haber cycle for the calculation of the lattice energy o

Question

Item 9

Consider the Born-Haber cycle for the calculation of the lattice energy of barium chloride.

Part A

Enter the chemical equation for the overall reaction: the formation of barium chloride from its constituent elements in their standard states.

Include all phases.

Part B

Enter the chemical equation for the formation of the gaseous metal from its standard state.

Include all phases.

Part C

Enter the chemical equation for the dissociation of the gaseous diatomic nonmetal.

Include all phases.

Part D

Enter the chemical equation for the ionization of the gaseous metal atom.

Include all phases.

Part E

Enter the chemical equation for the electron addition to the gaseous nonmetal atoms.

Include all phases.

Part F

Enter the chemical equation for the formation of the crystalline solid from the gaseous ions.

Include all phases.

Part G

Which of the above reactions has an enthalpy that corresponds to the lattice energy?A B C D E F

Explanation / Answer

Born haber cycle for BaCl2

Part A. Overall equation

Ba(s) + Cl2(g) ---> BaCl2(s)

Part B. Formation of gaseous metal from standard state

Ba(s) ---> Ba(g)

Part C. Dissociation of diatomic nonmetal

Cl2(g) ---> 2Cl(g)

Part D. Ionization of gesous metal atom

Ist ionization : Ba(g) ----> Ba+(g) + e-

Second ionization : Ba+ ---> Ba2+(g) + e-

Part E. Electron addition to nonmetal atom

2Cl- + 2e- ---> 2Cl-(g)

Part F. Formation of crystalline solid

Ba2+(g) + 2Cl-(g) ---> BaCl2(s)

Part G. the lattice energy for BaCl2 is equal to Part F.

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