74. Experiments were conducted to study the rate of the reaction represented by this equation.21 2NO(g) + 2H2(g) → N2(8) + 2H20(g) Initial concentrations and rates of reaction are given here. Experiment Initial Concentration Initial Concentration, [H2] Initial Rate of Formation of [NO] (mol L-) (mol L-1 min ) N2 (mol L-1 min ) 1 0.0060 0.0010 1.8 x 10-4 2 0.0060 0.0020 3.6 x 10-4 3 0.0010 0.0060 0.30 x 10-4 4 0.0020 0.0060 1.2 x 10-4 Consider the following questions: (a) Determine the order for each of the reactants, NO and H2, from the data given and show your reasoning. (b) Write the overall rate law for the reaction. (c) Calculate the value of the rate constant, k, for the reaction. Include units. (d) For experiment 2, calculate the concentration of NO remaining when exactly one-half of the original amount of H2 had been consumed. (e) The following sequence of elementary steps is a proposed mechanism for the reaction. Step 1: NO + NO = N,0, Step 2: N202 + H, = H20+N,0 Step 3: N20+ H2 = N2+ H20 Based on the data presented, which of these is the rate determining step? Show that the mechanism is consistent with the observed rate law for the reaction and the overall stoichiometry of the reaction.

Draw the order of reaction graphs (reaction rate vs the concentration) for [NO] and [H2]. Explain the difference between the two graphs

Ⓒ Macmillan Learning Enter these data into the graphing tool and determine the value and units of the rate constant, k, for this reaction. Graphing Tool Add Row 10 total rows [A] [A] vs. t In[A] In[A] vs. t t (min) 0.0 2.0 4.0 6.0 1/[A] vs. t [A] (M) 1.00 0.66 0.43 0.28 1/[A] Clear All Data

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A chemistry graduate student is studying the rate of this reaction: →H2CO3aq+H2OaqCO2aq She fills a reaction vessel with H2CO3 and measures its concentration as the reaction proceeds time(seconds) H2CO3 0 0.500M 10. 0.101M 20. 0.0563M 30. 0.0390M 40. 0.0298M Use this data to answer the following questions. Write the rate law for this reaction. rate =k   Calculate the value of the rate constant k.Round your answer to 2 significant digits. Also be sure your answer has the correct unit symbol. =k

For the reaction A → products, concentration and time data were collected. t (s) [A] (M) Enter these data into the graphing tool to determine the reaction order. 0.0 3.40 25.0 2.28 50.0 1.53 75.0 1.02 Graphing Tool Clear All Data [A] vs. t In[A] vs. t 1/[A] vs. t t [A] In[A] 1/[A] 3.4 3.4 1.223775 0.294118 25 2.28 0.824175 0.438596 2.822 + 50 1.53 0.425268 0.653595 2.244 + 75 1.02 0.019803 0.980392 1.666 - 1.088 - 0.51 - 15 30 45 60 75 t y=-0.03156 x + 3.241000 2= 0.971 Add Row 10 total rows What is the reaction order? O 1 Calculate the concentration of A after 127 s. [A]127 s = M [V)

Consider the following fictitious reaction and the measured initial rates at different reaction conditions. Determine the rate law for this reaction. X (g) + y (g) XY (g) Trial 1 2 3 Initial Rate (M/h) 0.05069 [X] M [Y] M 0.1383 0.1860 0.1383 0.6783 0.18476 0.3804 0.1860 0.05079

The reaction CH3NC → CH3CN has a rate constant of 0.498 s-1 at a specific temperature. What is the concentration of CH3NC after 41 seconds if its initial concentration is 1.368 M? (the answer should be entered with 3 significant figures; do not enter units; give answer in scientific notation--valid notation examples include 1.23e-8 and 1.23e8 and -1.23e-4 and 1.23e0) esc 3 7 delete Q E Y P A D G K return ock V B N M command option control option command 10 40 an the a greates4

Need the following questions answered The reaction of interest:                                       O2 (g) +          2 NO (g)         →        2 NO2 (g)   Expt. [O2] (M) [NO] (M) Initial Rate (M/s) 1 0.0110 0.0130 0.00321 2 0.0220 0.0130 0.00640 3 0.0110 0.0260 0.01280 4 0.0330 0.0130 0.00960 5 0.0110 0.0390 0.02880   What is the reaction order for oxygen?         What is the reaction order for nitrogen monooxide?       What is the overall reaction order?     What is the rate law for this reaction?         What is the specific rate constant (k) for this reaction?         Write the rate law for this reaction that includes the numerical value of the specific rate constant: