Choose the Reaction That Illustrates ΔH°_f for Ca(NO₃)₂

question 82

Multiple Choice

Choose the reaction that illustrates ΔH°_f for Ca(NO₃) ₂.

• A)Ca(s)+ N₂(g)+ 3O₂(g)→ Ca(NO₃)₂(s)
• B)Ca²⁺(aq)+ 2 NO₃^-(aq)→ Ca(NO₃)₂(aq)
• C)Ca(s)+ 2 N(g)+ 6 O(g)→ Ca(NO₃)₂(s)
• D)Ca(NO₃)₂(aq)→ Ca²⁺(aq)+ 2 NO₃^-(aq)
• E)Ca(NO₃)₂(s)→ Ca(s)+ N₂(g)+ 3O₂(g)

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Definitions:

Korotkoff Sounds

Sounds heard over an artery when blood pressure is determined by the auscultatory method; caused by turbulent flow of blood.

Azygos Vein

A vein running up the side of the thoracic vertebral column, draining blood from the chest wall and upper lumbar region into the superior vena cava.

Superior Vena Cava

A major vein carrying deoxygenated blood from the upper half of the body to the heart's right atrium.

Thorax

The part of the body located between the neck and the abdomen, enclosing the chest and containing the heart and lungs; it is protected by the rib cage.