Question

The decomposition of HI (g) into its elements in the gas phase at 800 K is...

The decomposition of HI (g) into its elements in the gas phase at 800 K is found to proceed by a second order process.

A) Please write a balanced equation for the reaction (smallest integer ratio of coefficients, please).

B) Please write the rate law for the reaction:

C) Given that it takes 142 s for the [HI (g)] to change from 6.75 x 10-2 M to 3.50 x 10-2 M, please calculate the value of the rate constant (and its units) at 800 K.

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Decomposition of HI into its elements is:

<---this is into its elements in the gas phase (notice is not H2 neither I2)

Rate law is,

You need to solve it in order to calculate the k

It change from 6.75x10-2M to 3.5x10-2M

You can rearrange the eqution to calculate the k

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The gas-phase decomposition of HI HI (g) → ½ H2 (g) + ½ I2 (g) has...
The gas-phase decomposition of HI HI (g) → ½ H2 (g) + ½ I2 (g) has k = 30. L/mol⋅min at 443°C. What is the concentration after 3.3 minutes if the initial concentration of HI was 0.010 M? Write the rate law for the reaction.
A suggested mechanism for the gas phase decomposition of nitrous oxide is: step 1 slow:   N2O...
A suggested mechanism for the gas phase decomposition of nitrous oxide is: step 1 slow:   N2O --> N2 + O step 2 fast:   N2O + O --> N2 + O2 (1) What is the equation for the overall reaction? Use the smallest integer coefficients possible. (2) Which species acts as a catalyst? Enter formula. (3) Which species acts as a reaction intermediate? Enter formula. (4) Complete the rate law for the overall reaction that is consistent with this mechanism. (Use...
a.)For the gas phase decomposition of hydrogen iodide at 700 K 2 HI---->H2 + I2 the...
a.)For the gas phase decomposition of hydrogen iodide at 700 K 2 HI---->H2 + I2 the following data have been obtained: [HI], M 0.530 0.187 0.114 8.16×10-2 time, s 0 48.0 96.0 144 The average rate of disappearance of HI over the time period from t = 48.0 s to t = 96.0 s is M s-1. b.)For the gas phase decomposition of phosphine at 120 °C 4 PH3(g)----->P4(g) + 6 H2(g) the following data have been obtained: [PH3], M...
The decomposition of hydrogen iodide in the gas phase goes as follows at 600 K. 2...
The decomposition of hydrogen iodide in the gas phase goes as follows at 600 K. 2 HI (g)->H2 (g) + I2 (g) Rate = k[HI]2 k = 9.7x10-6 M-1 s -1 a) Starting with an HI concentration of 0.030 M, what is the concentration of HI after 6.00 days? b) What is the concentration of H2 in the flask after 6.00 days? c) How much time would it take to drop the concentration from 0.030 M to 0.025 M? d)...
1) The gas phase decomposition of dinitrogen pentoxide at 335 K N2O5(g)  2 NO2(g) + ½ O2(g)...
1) The gas phase decomposition of dinitrogen pentoxide at 335 K N2O5(g)  2 NO2(g) + ½ O2(g) is first order in N2O5 with a rate constant of 4.70×10-3 s-1. If the initial concentration of N2O5 is 0.105 M, the concentration of N2O5 will be  Mafter 391 s have passed. 2) The gas phase decomposition of dinitrogen pentoxide at 335 K N2O5(g)2 NO2(g) + ½ O2(g) is first order in N2O5 with a rate constant of 4.70×10-3 s-1. If the initial concentration of...
The following data are obtained for the gas phase decomposition of acetaldehyde: k (L/mole s)    0.0105            ...
The following data are obtained for the gas phase decomposition of acetaldehyde: k (L/mole s)    0.0105             0.101               0.60                 2.92             T (K)               700                  750                  800                  850          Plot these data (ln k versus 1/T) and find the activation energy for the reaction. Please show work and graph.
Please study the table of data below, collected for the gas phase combination reaction of N2O...
Please study the table of data below, collected for the gas phase combination reaction of N2O with O3 at 298 K and constant volume (1.00 L). Experiment [N2O]0 [O3]0 Initial rate of reaction of O3 (M/s) 1 .010 .010 6.01 x 10^-4 2 .010 .020 1.20 x 10^-3 3 .020 .020 1.19 x 10^-3 A) Please determine the order of each reactant and write the rate law for the overall reaction. B) The overall reaction is: N2O (g) + O3...
The rate law for decomposition of acetaldehyde is rate= k[acetaldehyde]2 what is the rate of the...
The rate law for decomposition of acetaldehyde is rate= k[acetaldehyde]2 what is the rate of the reaction when the [acetaldehyde]= 1.75 x 10-3 M and the rate constant is 6.73 x 10-6 M-1 . S-1
The decomposition of ammonia on a platinum surface at 1129 K occurs according to the following...
The decomposition of ammonia on a platinum surface at 1129 K occurs according to the following reaction: 2 NH3(g) --> N2(g) + 3 H2(g). It occurs via zero order kinetics. Use the following kinetic data which report the variation of ammonia concentration in the gas phase with time "t" to evaluate the rate constant for the reaction at 1129 K. 103[NH3] (in M) 2.10 1.85 1.47 1.23 .86 .57 .34 t/s 0 200 400 600 800 1000 1200 Suggest why...
In a study of the gas phase decomposition of hydrogen peroxide at 400 °C H2O2(g)H2O(g) +...
In a study of the gas phase decomposition of hydrogen peroxide at 400 °C H2O2(g)H2O(g) + ½ O2(g) the following data were obtained: [H2O2], M 0.133 6.65×10-2 3.33×10-2 1.67×10-2 seconds 0 16.1 48.2 112 Hint: It is not necessary to graph these data. (1) The observed half life for this reaction when the starting concentration is 0.133 M is s and when the starting concentration is 6.65×10-2 M is s. (2) The average (1/[H2O2]) / t from t = 0...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT