January 2018 NY Regents Chemistry Exam
11 Given the equation representing a reaction: O + O → O2
Which statement describes the changes that occur as the oxygen molecule is produced?
(1) Energy is absorbed as bonds are broken.
(2) Energy is absorbed as bonds are formed.
(3) Energy is released as bonds are broken.
(4) Energy is released as bonds are formed
Solution: In the equation we can see two atoms of oxygen coming together to form a molecule. Bond is formed. When a bond is formed energy is released.
Answer: 4
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