For the ionic compound MX, made up of generic metal M and Generic, gaseous halog

Question

For the ionic compound MX, made up of generic metal M and Generic, gaseous halogen X, the steps of the born-haber cycle are shown here. Write the overall reaction, and identify the name of the enthalpy change for each reaction.

Reaction Enthalpy

Overall reaction in numbers and enthalpy of the overall reaction:

Choices for Enthalpy in column 2 next to the reaction= 1/2 bond energy of X-X, Enthalpy of formation of MX, Ionization energy, eletron affinity, lattice energy, bond energy of X-X, -lattice energy, enthalpy of sublimation

For the ionic compound MX, made up of generic metal M and Generic, gaseous halogen X, the steps of the born-haber cycle are shown here. Write the overall reaction, and identify the name of the enthalpy change for each reaction. Reaction Enthalpy M+(g) + X-(g) MX(s) Overall reaction in numbers and enthalpy of the overall reaction: Choices for Enthalpy in column 2 next to the reaction= 1/2 bond energy of X-X, Enthalpy of formation of MX, Ionization energy, eletron affinity, lattice energy, bond energy of X-X, -lattice energy, enthalpy of sublimation

Explanation / Answer

Overall reaction is :-

M(s) + (1/2)*X2(g) -------------> MX(s)

Now, M(s) ------> M(g) ; +ve enthalpy & endothermic reaction

(1/2)*X2(g) -------> X(g) ; +ve enthalpy & endothermic reaction

M(g) --------> M+(g) + e- ; +ve enthalpy & endothermic reaction

X(g) + e- ------> X-(g) ; -ve enthalpy & exothermic reaction

Enthalpy of overall reaction = (1/2)*bond energy of X-X + Ionization energy + enthalpy of sublimation - electron affinity - lattice enthalpy

Note, only numerical values of enrgy are to be put in the formula of the enthaly of the overall reaction to get the right result

Related Questions

Navigate

• Browse (All)
• Browse F
• Subjects

---