
Interpretation : The statement corresponding to negative and positive sign of energy is to be stated.
Concept Introduction : According to

Answer to Problem 15A
The negative sign of energy indicates that the reaction is an exothermic reaction, whereas positive sign indicates that the reaction is endothermic reaction.
Explanation of Solution
During a reaction the energy is either absorbed or energy is released. The reaction in which heat is released is called an exothermic reaction and change in enthalpy comes out to be negative, while the reactions in which the heat is absorbed are called endothermic reaction. The enthalpy change comes out to be positive for endothermic reactions.
The negative sign of energy indicates that the reaction is an exothermic reaction, whereas positive sign indicates that the reaction is endothermic reaction.
Chapter 10 Solutions
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