At 25 ^$\circ$ C, the Following Heats of Reaction Are Known

question 97

Multiple Choice

At 25 ^$\circ$ C, the following heats of reaction are known: $\begin{array}{ll}2 \mathrm{ClF}(\mathrm{~g}) +\mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{Cl}_{2} \mathrm{O}(\mathrm{~g}) +\mathrm{F}_{2} \mathrm{O}(\mathrm{~g}) & \Delta \mathrm{H}_{\mathrm{rxn}}^{\circ}=167.4 \mathrm{~kJ} / \mathrm{mol} \\2 \mathrm{ClF}_{3}(\mathrm{~g}) +2 \mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{Cl}_{2} \mathrm{O}(\mathrm{~g}) +3 \mathrm{~F}_{2} \mathrm{O}(\mathrm{~g}) & \Delta \mathrm{H}_{\mathrm{rxn}}^{\circ}=341.4 \mathrm{~kJ} / \mathrm{mol} \\2 \mathrm{~F}_{2}(\mathrm{~g}) +\mathrm{O}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{~F}_{2} \mathrm{O}(\mathrm{~g}) & \Delta \mathrm{H}_{\mathrm{rxn}}^{\circ}=-43.4 \mathrm{~kJ} / \mathrm{mol}\end{array}$ At the same temperature, use the above data to calculate the heat released (kJ) when 3.40 moles of ClF(g) reacts with excess F₂: ClF(g) + F₂(g) $\rarr$ ClF₃(g)

• A) 109 kJ
• B) 233 kJ
• C) 370. kJ
• D) 465 kJ
• E) 1,580 kJ

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Definitions:

Penfield

Wilder Penfield was a pioneering neurosurgeon and researcher whose stimulation of the human brain cortex led to important discoveries in epilepsy treatment and the mapping of brain functions.

Serial Recall

The cognitive process of retrieving or recalling information from memory in the exact order in which it was presented or learned.

Temporal Associations

The relationship between events in time, often influencing how memories and perceptions are formed.

Recognition

The cognitive process of identifying previously encountered information from an array of options.