Cold Packs, Whose Temperatures Are Lowered When Ammonium Nitrate Dissolves

question 27

Multiple Choice

Cold packs, whose temperatures are lowered when ammonium nitrate dissolves in water, are carried by athletic trainers when transporting ice is not possible. Which of the following is true of this reaction?

• A) .  H < 0, process is exothermic
• B) .  H > 0, process is exothermic
• C) .  H < 0, process is endothermic
• D) .  H > 0, process is endothermic
• E) .  H = 0, since cold packs are sealed

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Definitions:

Appreciative Inquiry

An approach to organizational change focusing on identifying what works well, analyzing why it works well, and then doing more of it.

Dreaming

A series of thoughts, images, or emotions occurring during sleep, particularly during REM sleep, reflecting complex cognitive processes.

Action Research

A participative and collaborative method of inquiry that involves a cycle of reflection, planning, action, and evaluation to solve problems or improve practices within communities or organizations.

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An approach aimed directly at eliminating or managing the source of a problem, as opposed to strategies that manage the symptoms or consequences.