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:

Tides

The rise and fall of sea levels caused by the gravitational forces exerted by the Moon, Sun, and rotation of the Earth.

Solar Heating

The process of increasing the temperature of an object, substance, or space using energy directly from the sun.

Sunspot Activity

Phenomena on the Sun's surface that appear as dark spots due to lower temperatures, often associated with magnetic activity.

Greenhouse Gases

Gases in Earth's atmosphere, such as carbon dioxide and methane, that trap heat and contribute to global warming.