Use the _DfH°° and _DrH°information Provided to Calculate _DfH° for IF

question 26

Multiple Choice

Use the _DfH°° and _DrH°information provided to calculate _DfH° for IF: $$\begin{array} { l c c } & \mathrm { D } _ { \mathrm { f } } H ^ { \circ } \left( \mathrm { kJ } \mathrm { mol } ^ { - 1 } \right) & \mathrm { IF } 7 ( g ) + \mathrm { I } _ { 2 } ( g ) \rightarrow \mathrm { IF } _ { 5 } ( g ) + 2 \operatorname { IF } ( g ) \quad \mathrm { D } _ { \mathrm { r } } H ^ { \circ } = - 89 \mathrm {~kJ} \\\operatorname { IF } _ { 7 } ( g ) & - 941 \\\operatorname { IF } _ { 5 } ( g ) & - 840\end{array}$$

• A)101 kJ mol^-1
• B)-146 kJ mol^-1
• C)-190.kJ mol^-1
• D)-95 kJ mol^-1
• E)24 kJ mol^-1

---

Definitions:

Directive Leadership Style

A leadership approach where the leader gives clear and authoritative directions to subordinates, setting clear standards and expectations.

Satisfied Employee

An employee who experiences contentment and fulfillment from their job, often leading to higher productivity and loyalty to the company.

Identifying Skills

The ability to recognize, categorize, and label individual and group skills.

Worker Morale

The overall outlook, attitude, satisfaction, and confidence that employees feel at work, which can significantly affect productivity and team cohesion.