Use the Born-Haber Cycle to Calculate the Standard Enthalpy of Formation

question 85

Multiple Choice

Use the Born-Haber cycle to calculate the standard enthalpy of formation ( $\Delta$ H ) for LiCl(s) given the following data: $\Delta$ H(sublimation) Li = 155.2 kJ/mol
I₁ (Li) = 520 kJ/mol
Bond energy (Cl-Cl) = 242.7 kJ/mol
EA (Cl) = 349 kJ/mol
Lattice energy (LiCl(s) ) = 828 kJ/mol

• A)440 kJ/mol
• B)320 kJ/mol
• C)-260 kJ/mol
• D)-380 kJ/mol
• E)-1420 kJ/mol

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Definitions:

Overhead Applied

The allocation of estimated overhead costs to individual units of production, based on a predetermined rate.

Forming Department

A section in manufacturing where raw materials are shaped or formed into parts for further production processes.

Machine-Hours

The total hours that machinery is operated during the production process.

Predetermined Overhead Rate

A rate used to allocate manufacturing overhead to individual products or jobs, based on a predetermined formula, prior to actual production.