Question

Whether a reaction is endothermic or exothermic can be indicated by:

• A. enthalpy change.
• B. entropy change.
• C. gibbs free energy change.
• D. activation energy.
• E. specific heat capacity.

Answer 1

The correct option is A enthalpy change.

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.