What Mass of Nitrogen Must Burn in Excess Oxygen to Produce

question 58

Multiple Choice

What mass of nitrogen must burn in excess oxygen to produce 18.0 kJ of heat, given the following thermochemical equation?
N₂ (g) + O₂ (g) →2 NO (g) D H = +1.80×10² kJ

• A) 0.100 g
• B) 2.80 g
• C) 5.60 g
• D) heat is not released by this reaction
• E) none of these

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