Sample Problem 6.2
Drawing Enthalpy Diagrams and Determining the Sign of DH
SOLUTION:
PLAN:
Determine whether heat is a reactant or a product. As a reactant, the products are at a higher energy and the reaction is endothermic. The opposite is true for an exothermic reaction.
(a) The reaction is exothermic.
EXOTHERMIC
DH = -285.8 kJ
DH = +40.7 kJ
ENDOTHERMIC
(b) The reaction is endothermic.
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