
Concept explainers
Interpretation:
The given reaction is to be classified as endothermic or exothermic.
Concept introduction:
Exothermic reaction: A reaction is exothermic if heat is released in the
Endothermic reaction: A reaction is endothermic if heat is absorbed in the chemical reaction.

Answer to Problem 69A
The given reaction is endothermic in nature because the enthalpy of products is greater than reactants. This means that there is absorption of energy.
Explanation of Solution
A reaction is endothermic if enthalpy of products is greater than reactants and exothermic when enthalpy of products is less than reactants.
As from the graph it is clear that products have higher enthalpy than reactants. Therefore reaction is endothermic.
The given reaction is endothermic.
Chapter 15 Solutions
Glencoe Chemistry: Matter and Change, Student Edition
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