Question 7 Below in the figure of a Reaction Energy Diagram is labeled two param

Question

Question 7

Below in the figure of a Reaction Energy Diagram is labeled two parameters, "x" and "y". What are these two parameters and is this reaction endothermic or exothermic?

"x" is the heat of the reaction, "y" is the energy of activation and this reaction is exothermic.

"x" is the energy of activation, "y" is the heat of the reaction and this reaction is endothermic.

"x" is the heat of the reaction, "y" is the energy of activation and this reaction is endothermic.

"x" is the energy of activation, "y" is the heat of the reaction and this reaction is exothermic.

"x" is the heat of the transition state, "y" is the heat of the reaction and this reaction is exothermic.

Question 8

What is the energy of activation, Ea, of a reaction if the rate constant, k, is 0.75 s-1 at 25 degrees celsius and 11.5 s-1 at 75 degrees celsius?

20.4 kJ/mol

47.1 kJ/mol

none of the above

296 kJ/mol

15.8 kJ/mol

851 kJ/mol

31.4 kJ/mol

Question 9

A catalyst:

facilitates a reaction by decreasing DH.

provides a different molecular pathway for a reaction but does not affect the activation energy.

none of these.

increases the rate of reaction but takes no part in a chemical reaction.

produces an activated complex that is different from the activated complex in the uncatalyzed reaction.

Question 10

.Exhibit 13-13

Graphical analysis can be used to determine the rate law for a general reaction of reactant "A" going to products "B" and "C".

A

"x" is the heat of the reaction, "y" is the energy of activation and this reaction is exothermic.

"x" is the energy of activation, "y" is the heat of the reaction and this reaction is endothermic.

"x" is the heat of the reaction, "y" is the energy of activation and this reaction is endothermic.

"x" is the energy of activation, "y" is the heat of the reaction and this reaction is exothermic.

"x" is the heat of the transition state, "y" is the heat of the reaction and this reaction is exothermic.

Explanation / Answer

Many of your questions are incomplete, like the question 7 because you didn't attached the figure, so I can answer that question. Try to put all your questions per separated and with all the figures, so I can answer properly. Now I'll answer some of your questions, according to the data I have:

Question 8:

ln(k1/k2) = -Ea/R (1/T1-1/T2) R = 8.3144 j/mol K

ln(0.75/11.5) = -Ea/8.3144 (1/248 - 1/348)

Ea = 19.6 kJ/mol -----> Answer: not of the above

Question 9:

A catalyst is increases the rate of reaction but takes no part in a chemical reaction.

Question 11:

rate of dissapearing: 2.35x10-5 M

Rate of appearing: A relation 3:2 so = 2.35x10-5 x 2 / 3 = 1.57x10-5 M/s

Question 14: The last option

Question 15: C = Co x e(-kt)

0.01 = 0.07 x e(-0.0462xt)

0.01/0.07 = e(-0.0462xt) ---> ln(0.142857) = -0.0462xt t = ln(0.142857) / -0.0462 -----> t = 42.12 min.

The rest of the question I cannot answer them because you missed a lot of data and figures, so you need to put that so I can Answer. Put them on different questions each of them.

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