(a)
Interpretation:
The order of the given reaction has to be given.
Concept introduction:
Order of a reaction:
Order of a reaction is defined as the sum of exponents of the concentrations in the rate law of the given reaction.
(b)
Interpretation:
The rate law for the given reaction has to be given.
Concept introduction:
Concept introduction:
Rate law:
It is an equation that related to the dependence of the
(c)
Interpretation:
The picture has to be drawn to show the number of
Concept introduction:
Rate law:
It is an equation that related to the dependence of the reaction rate on the concentration of each substrates (reactants).
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General Chemistry: Atoms First
- One experimental procedure that can be used to determine the rate law of a reaction is the method of initial rates. What data are gathered in the method of initial rates, and how are these data manipulated to determine k and the orders of the species in the rate law? Are the units for k. the rate constant, the same for all rate laws? Explain. If a reaction is first order in A, what happens to the rate if [A] is tripled? If the initial rate for a reaction increases by a factor of 16 when [A] is quadrupled, what is the order of n? If a reaction is third order in A and [A] is doubled, what happens to the initial rate? If a reaction is zero order, what effect does [A] have on the initial rate of a reaction?arrow_forwardThe label on a bottle of 3% (by volume) hydrogen peroxide, H2O2, purchased at a grocery store, states that the solution should be stored in a cool, dark place. H2O2decomposes slowly over time, and the rate of decomposition increases with an increase in temperature and in the presence of light. However, the rate of decomposition increases dramatically if a small amount of powdered MnO- is added to the solution. The decomposition products are H2O and O2. MnO2 is not consumed in the reaction. Write the equation for the decomposition of H2O2. What role does MnO2 play? In the chemistry lab, a student substituted a chunk of MnO2 for the powdered compound. The reaction rate was not appreciably increased. WTiat is one possible explanation for this observation? Is MnO2 part of the stoichiometry of the decomposition of H2O2?arrow_forwardFor the reaction of nitrogen monoxide, NO, with chlorine, Cl2, 2NO(g)+Cl2(g)2NOCl(g) the observed rate law is Rate=k[NO]2[Cl2] What is the reaction order with respect to nitrogen monoxide and with respect to Cl2? What is the overall order?arrow_forward
- At 573 K, gaseous NO2(g) decomposes, forming NO(g) and O2(g). If a vessel containing NO2(g) has an initial concentration of 1.9 102 mol/L, how long will it take for 75% of the NO2(g) to decompose? The decomposition of NO2(g) is second-order in the reactant and the rate constant for this reaction, at 573 K, is 1.1 L/mol s.arrow_forwardAt 500 K in the presence of a copper surface, ethanol decomposes according to the equation C2H5OH(g)CH3CHO(g)+H2(g) The pressure of C2H5OH was measured as a function of time and the following data were obtained: Time(s) PC2H5OH(torr) 0 250. 100. 237 200. 224 300. 211 400. 198 500. 185 Since the pressure of a gas is directly proportional to the concentration of gas, we can express the rate law for a gaseous reaction in terms of partial pressures. Using the above data, deduce the rate law, the integrated rate law, and the value of the rate constant, all in terms of pressure units in atm and time in seconds. Predict the pressure of C2H5OH after 900. s from the start of the reaction. (Hint: To determine the order of the reaction with respect to C2H5OH, compare how the pressure of C2H5OH decreases with each time listing.)arrow_forwardGive at least two physical properties that might be used to determine the rate of a reaction.arrow_forward
- When phenacyl bromide and pyridine are both dissolved in methanol, they react to form phenacylpyridinium bromide. When equal concentrations of reactants were mixed in methanol at 35 C, these data were obtained: (a) Determine the rate law for this reaction. (b) Determine the overall order of this reaction. (c) Determine the rate constant for this reaction. (d) Determine the rate constant for this reaction when the concentration of each reactant is 0.030 mol/L.arrow_forwardConsider the following reaction: 2 NO(g) + 2 H2(g) N2(g) + 2 H2O(g) (a) The rate law for this reaction is second order in NO(g) and first order in H2(g). What is the rate law for this reaction?(b) If the rate constant for this reaction at a certain temperature is 79200, what is the reaction rate when [NO(g)] = 0.0852 M and [H2(g)] = 0.137 M?Rate =____ M/s.(c) What is the reaction rate when the concentration of NO(g) is doubled, to 0.170 M while the concentration of H2(g) is 0.137 M?Rate = ____ M/sarrow_forwardThe reaction 2 NO₂(g) + O₂(g) → N₂O5(g) + O₂(g) was studied at a certain temperature with the following results: (a) What is the rate law for this reaction? Rate = k [NO₂(g)] [03(g)] O Rate = k [NO₂(g)]² [03(g)] O Rate = k [NO₂(g)] [03(g)]² O Rate = k [NO₂(g)]² [03(g)]² O Rate = k [NO₂(g)] [03(g)]³ O Rate = k [NO₂(g)]* [03(g)] (b) What is the value of the rate constant? 137268 Experiment M/S AWNPE 1 2 3 4 [NO₂(g)] (M) 0.718 0.718 1.44 1.44 [03(g)] (M) 0.718 1.44 0.718 1.44 Rate (M/s) (c) What is the reaction rate when the concentration of NO₂(g) is 1.26 M and that of O3(g) is 2.10 M if the temperature is the same as that used to obtain the data shown above? 26600 53400 53400 1.07e+05arrow_forward
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