Please explain your answer!!! Chapter 19 Quiz Adobe Read File Edit View Window H
ID: 868870 • Letter: P
Question
Please explain your answer!!!
Chapter 19 Quiz Adobe Read File Edit View Window Help 59. Which of the following changes will affect the activation energy of a reaction? 1. Increasing or decreasing the reaction temperature. 2. Adding a catalyst 3. Increasing or decreasing the reactant concentrations. C) D) 1 and 2 E) 2 and 3 A) 1 only B) 2 only 3 only 60. The reaction CHCl30g) C120g) -e CCl4Cg) HC10g) has been proposed to occur by the following mechanism. Cl2 2Cl fast equilibrium CCl3 Cl CCl4 fast What is the rate law predicted by this mechanism? A) Rate -kaICC13 ICll B) Rate k2 ki/k 1) 1/2 CHC31 C1211 E) Rate exp Cl21 C) Rate k2[CHCl3][Cll Tools Sign Comment 2:53 AM 4/30/2015Explanation / Answer
59. Addition of a catalyst affects the activation energy of the reaction. So option B 2 is correct.
Explaination: Addition of a catalyst reduces the activation energy of the reaction thus increses the rate of the reaction. When the catalyst lowers the activation energy, it does not change the energies of the original reactants or products. Rather, the reactant energy and the product energy remain the same and only the activation energy is altered (lowered).