Answered Essay: Chapter 12| Kinetics 702 5. A study of the rate of the reaction represented as 2A → B gave the

Chapter 12| Kinetics 702 5. A study of the rate of the reaction represented as 2A → B gave the following data: 0.0 5.0 10.0 15.0 20.0 25.0 35.0 1.00 0.952 0.625 o.465 0.370 0.308 0.230 Time (s) A] (M) (a) Determine the average rate of disappearance of A between 0.0 s and 10.0 s, and between 10.0 s and 20.0 s. (b) Estimate the instantaneous rate of disappearance of A at 15.0 s from a graph of time versus IAl. What are the units of this rate? (c) Use the rates found in parts (a) and (b) to deternine the average rate of formation of B between 0.00 s and 10.0s and the instantaneous rate of formation of B at 15.0 s

Hello, I’m confused on number 5 part b and c. I know how to make the graph on part b but am having trouble figuring out how to estimate the instaneous rate of dissaperence of A at 15.0 s. also then on part c using all the answers together. The first pic is the textbook question. The second pic is what I have so far. the third pic is the answers in the back of the book. this is my second time posting this question… Thank you!

media%2F4cb%2F4cb7ce2c-3850-4dc1-ab52-49

media%2F854%2F854c54b8-7b23-421c-8996-f7

Chapter 12| Kinetics 702 5. A study of the rate of the reaction represented as 2A → B gave the following data: 0.0 5.0 10.0 15.0 20.0 25.0 35.0 1.00 0.952 0.625 o.465 0.370 0.308 0.230 Time (s) A] (M) (a) Determine the average rate of disappearance of A between 0.0 s and 10.0 s, and between 10.0 s and 20.0 s. (b) Estimate the instantaneous rate of disappearance of A at 15.0 s from a graph of time versus IAl. What are the units of this rate? (c) Use the rates found in parts (a) and (b) to deternine the average rate of formation of B between 0.00 s and 10.0s and the instantaneous rate of formation of B at 15.0 s

Expert Answer

Answer

To find the instataneous rate of reaction you must do a graph and then draw a tangent line, this line must touch the point (time = 15 s) but must not cross the line graph, then you have to choose some points from it and read the x values and the y values, then you have to do

frac{y2 - y1}{x2 - x1}

In your example I´m focussing and graphing the points where time is 10 , 15 and 20 secs.

The brown line is the tangent, it has values of y

y2 = 0.4

y1 = 0.5

X:

x1 = 13.7

x2 = 17.7

Calculate the slope

slope = (0.4 – 0.5 ) / (17.7-13.7 = – 0.025

the – sign is because the reactant is dissapearing, so it is correct to say that the instantaneous rate of dissapearance is 0.025 M/s

C. To calculate the average rate of reaction remember that:

frac{1}{a}frac{Delta A}{Delta T} = frac{1}{b}frac{Delta B}{Delta T}

in this case a = 2 and b = 1 so:

frac{1}{2}frac{Delta A}{Delta T} =frac{Delta B}{Delta T}

So we just need to divide the average rate of reaction you got in the first part (which is correct by the way)

Average rate of formation of B = 0.0375 / 2 = 0.01875 M/s

Instantaneous rate of formation, it follows the same stoichiometrical rule I wrote before:

frac{1}{2}frac{mathrm{d} A}{mathrm{d} t} =frac{mathrm{d} B}{mathrm{d} T}

so the instantaneous rate of formation of B is 0.025 / 2 = 0.0125 M /s

As an extra for you to see the formation of B, i calculated the formation of B from A, the ammount of A that dissapeared is the ammount of B formated dividided by 2.

Time B
0 0
5 0.024
10 0.1875
15 0.2675
20 0.315
25 0.346
30 0.385

If you want to practice, try to get the instantaneous rate of formation of B by drawing a tangent line as I did in part b, you should be gettin the slope value of 0.0125 M

Buy Essay
Calculate your paper price
Pages (550 words)
Approximate price: -

Help Me Write My Essay - Reasons:

Best Online Essay Writing Service

We strive to give our customers the best online essay writing experience. We Make sure essays are submitted on time and all the instructions are followed.

Our Writers are Experienced and Professional

Our essay writing service is founded on professional writers who are on stand by to help you any time.

Free Revision Fo all Essays

Sometimes you may require our writers to add on a point to make your essay as customised as possible, we will give you unlimited times to do this. And we will do it for free.

Timely Essay(s)

We understand the frustrations that comes with late essays and our writers are extra careful to not violate this term. Our support team is always engauging our writers to help you have your essay ahead of time.

Customised Essays &100% Confidential

Our Online writing Service has zero torelance for plagiarised papers. We have plagiarism checking tool that generate plagiarism reports just to make sure you are satisfied.

24/7 Customer Support

Our agents are ready to help you around the clock. Please feel free to reach out and enquire about anything.

Try it now!

Calculate the price of your order

Total price:
$0.00

How it works?

Follow these simple steps to get your paper done

Place your order

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.

HOW OUR ONLINE ESSAY WRITING SERVICE WORKS

Let us write that nagging essay.

STEP 1

Submit Your Essay/Homework Instructions

By clicking on the "PLACE ORDER" button, tell us your requires. Be precise for an accurate customised essay. You may also upload any reading materials where applicable.

STEP 2

Pick A & Writer

Our ordering form will provide you with a list of writers and their feedbacks. At step 2, its time select a writer. Our online agents are on stand by to help you just in case.

STEP 3

Editing (OUR PART)

At this stage, our editor will go through your essay and make sure your writer did meet all the instructions.

STEP 4

Receive your Paper

After Editing, your paper will be sent to you via email.

× How can I help you?