Use the bond energies in Table 20.1 and the accounting format shown in Section 20.3 to determine whether these reactions are exothermic or endothermic:
(a)
(b)
Whether the given reactions are exothermic or endothermic.
Answer to Problem 1TS
The given reactions are exothermic reactions.
Explanation of Solution
(a) The given reaction,
There is one
There is one
Thus, the total energy absorbed to break the bonds in the reactant is
There are two
Thus, the net energy of the reaction can be given as,
Thus, it is an exothermic reaction.
(b) The given reaction,
There is one
There are five oxygen molecules having
There are two
Also, there are two
Thus, the total energy released to make the bonds in the product is
Thus, the net energy of the reaction can be given as,
Thus, it is an exothermic reaction.
Conclusion:
Therefore, the given reactions are exothermic reactions.
Chapter 20 Solutions
Conceptual Physical Science Explorations
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