Question:
The addition of a catalyst during a chemical reaction alters which of the following quantities of the reaction?
The addition of a catalyst during a chemical reaction alters which of the following quantities of the reaction?
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A catalyst speeds up a reaction by decreasing activation energy, but it does not affect the thermodynamic properties of the reaction.
Updated On: Feb 25, 2025
- Enthalpy
- Activation energy
- Entropy
- Internal energy
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The Correct Option is B
Solution and Explanation
A catalyst functions by providing an alternative reaction pathway that has a lower activation energy (E\(_a\)), thereby increasing the reaction rate.
- Catalysts do not alter:
- Enthalpy (\(\Delta H\)): Since the reactants and products remain the same.
- Internal energy (\(U\)): The total energy of the system is unchanged.
- Entropy (\(\Delta S\)): The disorder of the system remains unaffected.
Thus, a catalyst only lowers the activation energy, making it easier for reactants to reach the transition state.
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