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muminat
3 years ago
5

What is NOT true for a catalyst? 1. A catalyst increases the rate of a chemical reaction by decreasing activation energy. 2. A c

atalyst is not consumed in chemical reactions. 3. A catalyst can convert an endothermic reaction into an exothermic reaction. 4. A catalyst may be used in the solid, liquid or gaseous phase.
Chemistry
1 answer:
Harrizon [31]3 years ago
8 0

Answer:

3. A catalyst can convert an endothermic reaction into an exothermic reaction.

Explanation:

<em>What is NOT true for a catalyst? </em>

<em>1. A catalyst increases the rate of a chemical reaction by decreasing activation energy.</em> TRUE. A positive catalyst increases the reaction rate by decreasing the activation energy.

<em>2. A catalyst is not consumed in chemical reactions.</em> TRUE. A catalyst is recovered unaltered at the end of the reaction.

<em>3. A catalyst can convert an endothermic reaction into an exothermic reaction.</em> FALSE. A catalyst cannot modify the enthalpy of a reaction.

<em>4. A catalyst may be used in the solid, liquid or gaseous phase.</em> TRUE. If the catalyst is in the same phase as the reaction, the catalysis is homogeneous. Else, the catalysis is heterogeneous.

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