The enthalpy changes of formation of the gaseous oxides of nitrogen (N2O and NO) are positive because of:
A
the high bond energy of the nitrogen molecule
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B
the high electron affinity of oxygen atoms
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C
the high electron affinity of nitrogen atoms
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D
the tendency of oxygen to form O2−
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Solution
The correct option is C the high bond energy of the nitrogen molecule
The enthalpy changes of formation of the gaseous oxides of nitrogen are positive because of: the high bond energy of N≡N, more heat is absorbed to break up N2 molecule. Option A is correct.