Calculate the H°_rxn for the Following Reaction

question 13

Multiple Choice

Calculate the H°_rxn for the following reaction. (H°_f [AsH₃(g) ] = 66.4 kJ/mol; H°_f [H₃AsO₄(aq) ] = -904.6 kJ/mol; H°_f [H₂O(l) ] = -285.8 kJ/mol)
H₃AsO₄(aq) + 4H₂(g)  AsH₃(g) + 4H₂O(l)

• A) -1981.4 kJ
• B) -685.2 kJ
• C) -172.2 kJ
• D) 172.2 kJ
• E) 685.2 kJ

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Definitions:

Otitis

Inflammation or infection of the ear, which can affect different parts of the ear leading to conditions such as otitis media or externa.

Otosclerosis

A disorder of the middle ear that causes hearing loss due to abnormal bone growth around the stapes bone, which can immobilize it and prevent sound from entering the inner ear.

Pruritus

The medical term for itching, a symptom that can result from various conditions and cause a desire to scratch.

Jaeger Chart

A chart used in eye examinations consisting of texts of various sizes to test near vision acuity.