MCQ
Whether a reaction is endothermic or exothermic can be indicated by:
- AEnthalpy change.
- BEntropy change.
- CActivation energy.
- DSpecific heat capacity.
✓
Answer
- Enthalpy change.
Explanation:
Whether a reaction is endothermic or exothermic can be indicated by enthalpy change.
Enthalpy change is the difference in the enthalpy of products and the enthalpy of reactants.
A positive value of enthalpy change indicates endothermic reaction as the enthalpy of products is more than the enthalpy of reactants.
A negative value of enthalpy change indicates exothermic reaction as the enthalpy of products is less than the enthalpy of reactants.
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