Predict the Relationship Between the Lattice Energies (U) of KBr

question 78

Multiple Choice

Predict the relationship between the lattice energies (U) of KBr and CaO.

• A)U_CaO  4 U_KBr because the ionic charges are  2 and  2 and the distance between the ions is smaller.
• B)U_CaO  4 U_KBr because the ionic charges are  2 and  2 and the distance between the ions is larger..
• C)U_CaO  2 U_KBr because the ionic charges are  2 and  2 and the distance between the ions is smaller.
• D)U_CaO  4 U_KBr because the ionic charges are  2 and  2 and the distance between the ions is larger.
• E)U_CaO and U_KBr are about the same because the larger ionic charge is compensated by the larger distance between the ions.

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Definitions:

Materials Price Variance

The difference between the actual cost of materials used in production and the standard (expected) cost.

Standard Quantity Of Hours

The standard quantity of hours refers to the pre-determined amount of labor hours estimated to be necessary to produce a single unit of output.

Standard Cost Per Mip

The predetermined cost of manufacturing one unit of product, where Mip is typically a measure of output.

Direct Labour Efficiency Variance

A measure used in cost accounting to determine the difference between the labor time expected to produce goods and the actual labor time used.