Use the Born-Haber Cycle to Calculate the Lattice Energy of KCl(s)given

question 54

Multiple Choice

Use the Born-Haber cycle to calculate the lattice energy of KCl(s) given the following data: $\Delta$ H(sublimation) K = 79.2 kJ/mol
I₁ (K) = 418.7 kJ/mol
Bond energy (Cl-Cl) = 242.8 kJ/mol
EA (Cl) = 348 kJ/mol
$\Delta$ H (KCl(s) ) = -435.7 kJ/mol

• A)-165 kJ/mol
• B)288 kJ/mol
• C)629 kJ/mol
• D)707 kJ/mol
• E)828 kJ/mol

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Definitions:

Variance

A statistical measure of the dispersion of a set of data points in relation to their mean.

Mean

The arithmetic average of a set of numbers, calculated by adding all the numbers together and dividing by the count of numbers.

Variance

A measure of the dispersion or spread of a set of data points around their mean value.

Degrees of Freedom

The number of independent values or quantities that can vary in the calculation of a statistic, often necessary for assessing the significance of the statistic.