Use the Standard Reaction Enthalpies Given Below to Determine ΔH°_rxn

question 116

Multiple Choice

Use the standard reaction enthalpies given below to determine ΔH°_rxn for the following reaction: P₄(g) + 10 Cl₂(g) → 4 PCl₅(s) ΔH°_rxn = ?
Given:
PCl₅(s) → PCl₃(g) + Cl₂(g) ΔH°_rxn = +157 kJ
P₄(g) + 6 Cl₂(g) → 4 PCl₃(g) ΔH°_rxn = -1207 kJ

• A) -1835 kJ
• B) -1364 kJ
• C) -1050. kJ
• D) -1786 kJ
• E) -2100. kJ

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Definitions:

Somnambulism

Also known as sleepwalking, it is a disorder that causes people to get up and walk while in a state of sleep.

Sleepwalking

A sleep disorder leading an individual to walk or engage in other complex behaviors while still mostly asleep, often without remembering the episode later.

Preschoolers

Children who are approximately 3 to 5 years old, often characterized by rapid development in language, motor skills, and social understanding.

24-hour Period

A full day; the time it takes for the Earth to complete one rotation on its axis, comprising day and night.