11. A reaction mechanism usually is a. the same as the balanced chemical equatio

Question

11. A reaction mechanism usually is a. the same as the balanced chemical equation. b. restricted to only one possible explanation. c. obvious if the reaction order is known. d. difficult, if not impossible, to prove. e. obvious if the activation energy is known. 12. Complete the following statement: A catalyst a. increases the activation energy. b. alters the reaction mechanism. c. increases the average kinetic energy of the reactants. d. increases the concentration of reactants. e. increases the collision frequency of reactant molecules. 13. Challenge Problem: es to water and oxygen gas, and the activation energy Hydrogen peroxide de for this process is 42 kJ/mol. The hydroge is harmful to tissue, but the enzyme peroxide by lowering the activation energy to 7.0 kJ/mol. Assuming the frequency factor, A, is the same for both processes and independent of temperature, calculate the temperature required for the uncatalyzed decomposition to proceed at the same rate as the enzyme-catalyzed decomposition at 37°C (normal human body temperature). Is this a reasonable temperature for a biological organism? compos n peroxide formed in biological processes catalase catalyzes the decomposition hydrogen

Explanation / Answer

ANSWER 11 : (d) option is correct.

Although balanced chemical reactions are usually easy to determine, mechanisms of chemical, to end (products), it is very difficult to prove a mechanism for a chemical reaction.

ANSWER 12 : (b) alters the reaction mechanism is correct option regarding with a catalyst.

A catalyst alters the reaction mechanism like a detour, but this detour speeds things up rather than taking longer. A catalyst will not change the reaction in any factor other than speed of completion. The products will still be the same.

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