January 2019 NY Regents Chemistry Exam
12 Which equation represents energy being absorbed as a bond is broken? (1) H+H→H2 +energy
(2) H + H + energy→H2
(3) H2 →H+H+energy
(4) H2 +energy→H+H
Solution: When H2 molecule breaks into two H atoms, the bond is broken. Energy needs to be absorbed to break a bond. We should see energy on the left side.
Answer: 4
Prepare for the Chemistry Regents Exam: HERE
Contact us for chemistry tutoring: HERE