What Is ?_rH° for the Following Phase Change?
LiF(s) $\quad \Delta H ^ { \circ } {}_f ( \mathrm {~kJ} / \mathrm { mol } - \mathrm { rxn } )$

question 49

Multiple Choice

What is ?_rH° for the following phase change?
LiF(s) ? LiF(l)
Substance $\quad \Delta H ^ { \circ } {}_f ( \mathrm {~kJ} / \mathrm { mol } - \mathrm { rxn } )$
$\operatorname { LiF } ( s ) \quad - 616.93$
$\operatorname { LiF } ( l ) \quad - 598.65$

• A) 1215.58 kJ/mol-rxn
• B) 18.28 kJ/mol-rxn
• C) -1215.58 kJ/mol-rxn
• D) -18.28 kJ/mol-rxn
• E) 0 kJ/mol-rxn

---

Definitions:

Sales

The transactions involving the exchange of goods or services for money, representing the primary source of revenue for most businesses.

Production Departments

Specific divisions within a manufacturing facility where distinct stages of the production process are carried out.

Profit Centers

Divisions or departments within a company that are directly responsible for generating profits through their operations and business activities.

Percent of Sales

A financial ratio that expresses the relationship between a particular expense, income, or investment and the total sales revenue of a company.