The Decomposition of NO and NO₂ to the Elements Proceeds

question 23

Multiple Choice

The decomposition of NO and NO₂ to the elements proceeds via the following two reactions.
2NO(g) → N₂(g) + O₂(g) DH°rxn = -180 kJ
2NO₂(g) → N₂(g) + 2O₂(g) DH°rxn = -66.4 kJ
Calculate the enthalpy change for the reaction
2NO(g) + O₂(g) → 2NO₂(g)

• A) 244 kJ
• B) -244 kJ
• C) -114 kJ
• D) -293 kJ
• E) none of the above

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Definitions:

Lymphatic Ducts

Large vessels in the lymphatic system that transport lymph from the lymph nodes to the veins.

Neutrophils

A type of white blood cell that plays a crucial role in defending the body against infection by engulfing and destroying bacteria and fungi.

Macrophages

Large white blood cells found in tissue or mobile at sites of infection, absorbing and digesting cellular debris and pathogens.

Scavengers

Animals that consume dead or decaying organic matter, playing a critical role in the ecosystem by decomposing and recycling nutrients.