Question

Given the following equation and bond energies, determine which statement is true. N2+02 2NO N-N triple bond: 941 kJ/mol O-O double bond: 495 kJ/mol N-O bond: 201 kJ/mol

A. The reaction is exothermid
B. A nitrogen-oxygen bond is broken
C. The products have more energy than the reactants.
D. A triple bond between nitrogen atoms is formed

Answer 1

The reaction is exothermic

Step-by-step explanation:

If we look at this reaction system closely, we will discover that the energy of reactants is greater than that of the product. The excess energy possessed by the reactants must be given off at the end of the reaction.

Since ∆Hrxn = ∆Hproducts - ∆Hreactants and ∆Hreactants > ∆Hproducts hence ∆Hrxn is negative and the reaction is exothermic, hence the answer.