Use the data given below to construct a Born-Haber cycle to determine the electron affinity of Br. ΔH°(kJ mol-1) K(s) → K(g) 89 K(g) → K⁺(g) + e⁻ 419 Br2(l) → 2Br(g) 193 K(s) + ½Br2(g) → KBr (s) -394 KBr(s) → K⁺(g) + Br⁻(g) 674 A) -885 kJ B) -464 kJ C) +367 kJ D) -325 kJ E) +246 kJ
Electronic Transitions and Spectroscopy
The term “electronic” connotes electron, and the term “transition” implies transformation. In a molecule, the electrons move from a lower to a higher energy state due to excitation. The two energy states, the ground state and the excited state are the lowest and the highest energy states, respectively. An energy change is observed with this transition, which depicts the various data related to the molecule.
Photoelectron Spectroscopy
Photoelectron spectroscopy (PES) is a part of experimental chemistry. It is a technique used in laboratories that involves projecting intense beams of radiation on a sample element. In response, the element ejects electrons for which the relative energies are measured.
Use the data given below to construct a Born-Haber cycle to
determine the
ΔH°(kJ mol-1)
K(s) → K(g) 89
K(g) → K⁺(g) + e⁻ 419
Br2(l) → 2Br(g) 193
K(s) + ½Br2(g) → KBr (s) -394
KBr(s) → K⁺(g) + Br⁻(g) 674
- A) -885 kJ
- B) -464 kJ
- C) +367 kJ
- D) -325 kJ
- E) +246 kJ
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