In the hydrogenation of ethylene using a nickel catalyst, the initial concentration of ethylene is 1.50 mol-L. and its rate constant (k) is 0.0012 mol-L-Determine the rate of reaction if it follows a zero- order reaction mechanism.
In the hydrogenation of ethylene using a nickel catalyst, the initial concentration of ethylene is 1.50 mol-L. and its rate constant (k) is 0.0012 mol-L-Determine the rate of reaction if it follows a zero- order reaction mechanism.
Chapter12: Chemical Kinetics
Section: Chapter Questions
Problem 3RQ: One experimental procedure that can be used to determine the rate law of a reaction is the method of...
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![+ Zero-Order Reactions
Learning Goal:
To understand zero-order reactions.
Chemical kinetics is the study of the speed with which a chemical reaction occurs and the
factors that affect this speed. The speed of a reaction is the rate at which the
concentrations of reactants and products change. This relationship is expressed through
rate laws.
For a general reaction aA + bBgG+ hH, the rate law is given as
rate of reaction k[A] [B]"
where the coefficients and are experimentally determined while a, b, g, and h are
stoichiometric coefficients unrelated to me and m
Azero-order reaction has a rate law in which the sum of the exponents m +n + ... is
equal to zero. Thus, if there is only one reactant, the rate of reaction is independent of the
concentration of the reactant.
For a zero-order reaction, the graph of reactant concentration versus time is a straight line.
Therefore, the rate-law equation for a zero-order reaction can be compared to that of a
straight line, y=mx+b.
The units for the rate constant and the rate of reaction are the same.
Azero-order reaction slows down as the reaction proceeds.
The concentration of the reactants changes nonlinearly.
The rate of reaction does not equal the rate constant.
A higher concentration of reactants will not increase the reaction rate.
Submit
✓ Correct
A zero-order reaction is independent of the concentration of the reactants. Zero-order reactions have the following features:
Part B
Previous Answers
1. The concentration versus time graph is a straight line with a negative slope; this negative slope represents the rate constant of a reaction.
2. The rate of the reaction is equal to the rate constant.
3. The units ofle and the rate of reaction are mol-L-¹.s-¹.
Photochemical reactions and surface reactions are examples of zero-order reactions.
Submit
In the hydrogenation of ethylene using a nickel catalyst, the initial concentration of ethylene is 1.50 mol-L-¹ and its rate constant (k) is 0.0012 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.
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..
rate of reaction=541.6
Previous Answers
mol
L
<19 of 36
* Incorrect; Try Again; 4 attempts remaining
Review | Constants | Periodic Table](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F096b6bb3-2f11-49d8-9074-81efda173389%2F8f584b9d-ab62-4cbd-963b-eff5df96545c%2Fink6x3u_processed.jpeg&w=3840&q=75)
Transcribed Image Text:+ Zero-Order Reactions
Learning Goal:
To understand zero-order reactions.
Chemical kinetics is the study of the speed with which a chemical reaction occurs and the
factors that affect this speed. The speed of a reaction is the rate at which the
concentrations of reactants and products change. This relationship is expressed through
rate laws.
For a general reaction aA + bBgG+ hH, the rate law is given as
rate of reaction k[A] [B]"
where the coefficients and are experimentally determined while a, b, g, and h are
stoichiometric coefficients unrelated to me and m
Azero-order reaction has a rate law in which the sum of the exponents m +n + ... is
equal to zero. Thus, if there is only one reactant, the rate of reaction is independent of the
concentration of the reactant.
For a zero-order reaction, the graph of reactant concentration versus time is a straight line.
Therefore, the rate-law equation for a zero-order reaction can be compared to that of a
straight line, y=mx+b.
The units for the rate constant and the rate of reaction are the same.
Azero-order reaction slows down as the reaction proceeds.
The concentration of the reactants changes nonlinearly.
The rate of reaction does not equal the rate constant.
A higher concentration of reactants will not increase the reaction rate.
Submit
✓ Correct
A zero-order reaction is independent of the concentration of the reactants. Zero-order reactions have the following features:
Part B
Previous Answers
1. The concentration versus time graph is a straight line with a negative slope; this negative slope represents the rate constant of a reaction.
2. The rate of the reaction is equal to the rate constant.
3. The units ofle and the rate of reaction are mol-L-¹.s-¹.
Photochemical reactions and surface reactions are examples of zero-order reactions.
Submit
In the hydrogenation of ethylene using a nickel catalyst, the initial concentration of ethylene is 1.50 mol-L-¹ and its rate constant (k) is 0.0012 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.
▸ View Available Hint(s)
Templates Symbols Undo redo eser keyboard shortcuts Help
..
rate of reaction=541.6
Previous Answers
mol
L
<19 of 36
* Incorrect; Try Again; 4 attempts remaining
Review | Constants | Periodic Table
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