
Concept explainers
Interpretation:Whether the given reaction is endothermic or exothermic to bedescribed.
Concept introduction:The term
Here U, P and V are definite quantities.

Answer to Problem 29A
The reaction is exothermic and energy is released in form of heat.
Explanation of Solution
The given equation is as follows:
Enthalpy change for reaction is given by -67kJ.
In exothermic reaction, enthalpy change is a negative number. Because in this reaction, enthalpy is movedfrom the system. Thus the reaction is exothermic in nature. Thus energy is released in form of heat.
Products of exothermic reactions are hotter than reactant. Fire transfers energy in form of heat and light. Thus fire is an exothermic reaction.
Chapter 10 Solutions
World of Chemistry, 3rd edition
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