Rate Law Expression Worksheet
Grade 12 Chemistry worksheet covering rate law expressions, reaction orders, and factors affecting reaction rates.
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Rate Law Expression Worksheet
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Read each question carefully and provide your answers in the space provided. Show all your work for calculations.
1. Define what a rate law expression represents in chemical kinetics. What information does it convey about a reaction?
2. For the reaction A + B → C, if the rate law is determined to be Rate = k[A]²[B]¹, what is the overall order of the reaction?
First order
Second order
Third order
Zero order
3. The rate constant, k, is specific to a particular reaction at a particular .
4. The units of the rate constant (k) depend on the of the reaction.
5. The order of a reaction with respect to a reactant can always be determined directly from the stoichiometric coefficients in the balanced chemical equation.
True
False
6. Consider the reaction: 2NO(g) + O₂(g) → 2NO₂(g). The following initial rate data were obtained at a certain temperature:
Experiment | [NO] (M) | [O₂] (M) | Initial Rate (M/s) ---|---|---|--- 1 | 0.10 | 0.10 | 2.1 x 10⁻³ 2 | 0.10 | 0.20 | 4.2 x 10⁻³ 3 | 0.20 | 0.10 | 8.4 x 10⁻³
a) Determine the order of the reaction with respect to NO.
b) Determine the order of the reaction with respect to O₂.
c) Write the rate law expression for this reaction.
d) Calculate the value of the rate constant (k) with appropriate units.
7. Explain how temperature generally affects the rate constant (k) of a reaction. Briefly describe the collision theory explanation.
8. Based on the provided energy diagram, describe the role of activation energy in determining the rate of a chemical reaction.