The Reaction of Iron with Hydrochloric Acid Is Represented by the Following

question 4

Multiple Choice

The reaction of iron with hydrochloric acid is represented by the following thermochemical equation.
Fe(s) + 2HCl(aq) → FeCl₂(aq) + H₂(g) ; ΔH° = -87.9 kJ
If,in a particular experiment,1.56 kJ of heat was released at constant pressure,what volume of H₂(g) ,measured at STP,was produced? (R = 0.0821 L • atm/(K • mol) )

• A)1.38 × 10³ L
• B)0.434 L
• C)22.4 L
• D)1.26 × 10³ L
• E)0.397 L

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Definitions:

Surfactant

A substance that reduces surface tension between two liquids, or between a liquid and a gas, used extensively in medical treatment, especially in neonatal care to aid in breathing.

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Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide occurs.

Sinoatrial Node

A group of cells located in the right atrium of the heart that spontaneously generates electrical impulses, acting as the heart's natural pacemaker.

Heart Rate

The number of heartbeats per minute, a vital sign indicating the heart's activity.