Given the Equations Listed Below and Their Corresponding Enthalpies

question 60

Multiple Choice

Given the equations listed below and their corresponding enthalpies:
N₂O₄ (g) →2 NO₂ (g) D H = 58 kJ 2 NO (g) + O₂ (g) →2 NO₂ (g) D H = - 112 kJ What is D H for the following reaction?
2 NO (g) + O₂ (g) →N₂O₄ (g)

• A) - 170 kJ
• B) - 54 kJ
• C) - 112 kJ
• D) - 2 kJ
• E) none of these

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Definitions:

Adolescent

A developmental phase following childhood, marked by puberty's onset, forming a distinct sense of identity, and emerging independence.

Just-noticeable Difference

The smallest change in the intensity of a stimulus that can be detected by a sensory system.

Sensory Adaptation

A decrease in sensitivity to a constant level of stimulation.

Absolute Threshold

The smallest amount of physical stimulation required to detect a sensory input half of the time it is present.