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

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Definitions:

Continental Rifting

The process where a continent stretches and splits along a rift, often leading to the formation of a new ocean basin.

Ocean Basin

The deeper parts of the ocean, especially those that are not underlain by continental crust.

Uplift

The process by which areas of the Earth's crust are raised to higher elevations, often as a result of geological forces such as tectonic movements.

Mid-ocean Ridges

Underwater mountain ranges where new oceanic crust is formed through volcanic activity.