7. A student collected the initial-rate data in the chart below Experiment XO)l

Question

7. A student collected the initial-rate data in the chart below Experiment XO)l assal rate of 0 20 What is the experimental rate law for this reaction? 5) rate pxof to The formation of ammonia is shown in the above reaction If the rate of formation of ammonia is 9.0 x 10 mols, then the rate of consumption of nitrogen is 1) 6.0×10-4 mol/s 2) 4.5 x 10 mols 3) 1.4×10-3 mol s 4) 9.0 x 10 mol/s 5) 2.6×10-2 mois 9. A first order reaction goes to half completion in 79 hours What is the rate constant for this reaction? 1) 79 h 2) 39.5 h 3) 7.9 x 10h 4) 4.39×10-Jh-1 5) 8.77 10h 0 Base your answer to the following question on the table below which was obtained for the reaction A + B ?C. xperimentInitialInitial IB Initial rate of formation of C mol L) 0.20 0.40 mol L- 6.0x 10 6.0 x 10 24x 10 02060x 10 0.10 0.20 0.10 What is the rate law for this reaction?

Explanation / Answer

Ans 7

Let the rate law

r = k [XO]m [O2]n

From trial 1 and 3

r1/r3 = [XO]1m [O2]1n / [XO]3m [O2]3n

0.40/0.80 = [0.20]m [0.20]n / [0.20]m [0.40]n

0.40/0.80 =   [0.20]n / [0.40]n

0.5 = 0.5n

n = 1

From trial 1 and 2

r1/r2 =  [XO]1m [O2]1n / [XO]2m [O2]2n

0.40/6.4 =  [0.20]m [0.20]n / [0.80]m [0.20]n

0.40/6.4 =   [0.20]m / [0.80]m

0.0625 = 0.25m

0.252 = 0.25m

m = 2

Rate law

r = k [XO]2 [O2]

Option 2 is the correct answer

Related Questions

Navigate

• Browse (All)
• Browse 7
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.