Use the following data and the Born-Haber cycle to calculate the first ionization energy (ΔH IE1) of K(g) K(s) → K(g) 89 kJ mol-1 Cl(g) + e– → Cl–(g) -349 kJ mol-1 K(s) + ½ Cl2(g) → KCl(s) -437 kJ mol-1 K(g) → K+(g) + e– ΔH IE1 Cl2(g) → 2Cl(g) 244 kJ mol-1 K+(g) + Cl–(g) → KCl(s) -717 kJ mol-1
Bond Parameters
Many factors decide the covalent bonding between atoms. Some of the bond parameters are bond angle, bond order, enthalpy, bond length, etc. These parameters decide what kind of bond will form in atoms. Hence it is crucial to understand these parameters in detail and understand how changing these parameters affects the kind of bonding or various characteristics.
Bond Dissociation Energy
The tendency of an atom to attract an electron is known as its electronegativity.
Use the following data and the Born-Haber cycle to calculate the first ionization energy (ΔH IE1) of K(g)
K(s) → K(g) 89 kJ mol-1
Cl(g) + e– → Cl–(g) -349 kJ mol-1
K(s) + ½ Cl2(g) → KCl(s) -437 kJ mol-1
K(g) → K+(g) + e– ΔH IE1
Cl2(g) → 2Cl(g) 244 kJ mol-1
K+(g) + Cl–(g) → KCl(s) -717 kJ mol-1
Use the bond energies listed in the table below to estimate the standard enthalpy of the reaction:
CCl3CHCl2(g) + 2HF(g) → CCl3CHF2(g) + 2HCl(g)
C – H 412 kJ mol-1
C – C 348 kJ mol-1
C – Cl 338 kJ mol-1
H – Cl 431 kJ mol-1
C – F 484 kJ mol-1
H – F 565 kJ mol-1
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