The simple Rice-Herzfeld mechanism for decomposition of asethaldehyde is:
CH3COOH -.> CH3 + CHO
CHO -> CO + H
H + CH3CHO -> H2 + CH3CO
CH3 + CH3CHO -> CH4 + CH3CO
CH3CO -> CH3 + CO
2CH3 -> C2H6
If the rate of the first stage is ignored, then the decomposition rate of asethaldehyde follows a 3/2 order. Look for effective rate constants.
The simple Rice-Herzfeld mechanism for decomposition of asethaldehyde is: CH3COOH -.> CH3 + CHO...
6. [20pt] The Rice-Herzfeld mechanism for the thermal decomposition of acetaldehyde (CH:CНO) is k1 CH3CHO CH3 CHO k2 CH3:: + CH3CНО $ СН4 + CH-CHO- k3 CH2CHO CO CH3 k4 СH3: + CH3. $ C2Н6 Using the steady-state approximation for the intermediates and determine the differential rate law for the formation of methane (CH4). State the expression for the effective rate constant, keff
The mechanism of the pyrolysis of acetaldehyde corresponding to the chemical reaction CH3CHO(8) CH4(8) +CO(g) at 520 °C and 0.2 bar is kị kg CHCH0g) CH3 g) + CH0g) CH3(g) + CH3CHO(g) = CH4(g) + CH3COg) CH3CO(g) = CO(g) + CH3(g) CH3(g) + CH3(g) = C2H6() Is this reaction a chain reaction? If so, identify the initiation, propagation, inhibition, and termination step(s). Using the steady state approximation for intermediate species CH3(g) and CH3CO(g), derive the rate law 1/2 kz [CH2CHO]3/2
The decomposition of dimethyl ether, (CH3)20 at 510° C is a first-order process with a rate constant of 6.8 x 104 s 3. (CHs)20(g)CH4+H2+ COig) If the initial pressure of (CHs)2O is 135 torr, what is its pressure after 1420 s?
The first-order rate constant for the gas-phase decomposition of dimethyl ether, (CH3)20 → CH4 + H2 + CO is 3.2 x 10-4 5-1 at 450°C. The reaction is carried out in a constant-volume container. Initially, only dimethyl ether is present, and the pressure is 0.343 atm. What is the pressure of the system after 8.1 min? Assume ideal-gas behavior. 49) 0.29 x 0.44 atm
A sample of hydroiodic acid has a concentration of 1.46 M and a density of 1.25 g/mL. IF 50.0 ml s of this sample is removed and diluted with 155 ml.s of water (density = 1.00 g/mL), what is the molarity of the new sample? The decomposition of acetaldehyde (CH:CHO) is proposed to occur via a two-step mechanism. Step 1: CH3CHO + 12 + CH3 + HI + CO Step 2: CHI + HI – CH4 + 12 Which species...
1. a. The gas phase decomposition of sulfuryl chloride at 600 K SO2Cl2(g) -------> SO2(g) + Cl2(g) is first order in SO2Cl2 with a rate constant of 2.80×10-3 min-1. If the initial concentration of SO2Cl2 is 5.84×10-3 M, the concentration of SO2Cl2 will be _____M after 618 min have passed. b. The gas phase decomposition of dimethyl ether at 500 °C CH3OCH3(g)-------->CH4(g) + H2(g) + CO(g) is first order in CH3OCH3 with a rate constant of 4.00×10-4 s-1. If the...
1. For the reaction, CO, (g) 4 H2 (g) measured: CH4 (g) 2 HO (g), the following kinetic data are HJ 0.00500 M 0.00500 M 0.00250M 0.0100 M CO.] 0.00250 M 0.00750 M 0.00750 M 0.00250 M Temperature 500 K 500 K 500 K 450 K Rate 5.2 x 10 M/s 1.6 x 103 M/s 2.1 x 104 M/s 2x 10 M/s Based on this data, a) determine the rate law for the reaction (4 pts), b) calculate the rate...
2. Consider this two step mechanism for a reaction… Step 1 NO2 + O3 --> NO3 + O2 slow; rate determining step Step 2 NO3 + NO2 --> N2O5 fast a. What is the overall reaction? b. Identify the intermediates in the mechanism. c. Write the rate law expression for each step of the mechanism including any reversible reactions. c. What is the predicted rate law expression? Be sure to only list reactants from the overall equation and not intermediates...
#13 Interpreting Mechanisms 1. Consider the following mechanism: Step 1 Br2 2Br fast Step 2 Br + H2 H2Br fast Step 3 H2Br + Br 2HBr slow a. What is the overall equation? b. Identify the intermediate(s) if any. c. What is the molecularity and the rate law for each step including any reversible steps? d. What is the predicted rate law expression for this reaction. Be sure to only list reactants from the overall equation and...
Need ALL answered! 1. In the hydrogenation of ethylene using a nickel catalyst, the initial concentration of ethylene is 1.80 mol⋅L−1 and its rate constant (k) is 0.0016 mol⋅L−1⋅s−1 . Determine the rate of reaction if it follows a zero-order reaction mechanism. Express your answer to two significant figures and include the appropriate units. 2. The reaction 2X →products is a second-order reaction, and the rate constant is 8.8 × 10−3 1/M·s. If the initial concentration of X is 3.00...