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Questions and Answers
What does the units of the rate constant for a first order reaction denote?
What does the units of the rate constant for a first order reaction denote?
- Concentration$^{-1}$·Time$^{-1}$
- Time$^{-1}$ (correct)
- Mole$^{-1}$·Time$^{-1}$
- Energy$^{-1}$·Time$^{-1}$
Which of the following statements about a catalyst is accurate?
Which of the following statements about a catalyst is accurate?
- A catalyst decreases the activation energy. (correct)
- A catalyst forms an activated complex of higher potential energy.
- A catalyst always lowers the reaction rate.
- A catalyst changes the equilibrium constant of the reaction.
In a zero order reaction, which statement is true?
In a zero order reaction, which statement is true?
- The concentration of reactant remains constant. (correct)
- The reaction rate depends on the concentration of reactants.
- The reaction cannot occur without a catalyst.
- The rate constant has units of concentration.
What characterizes the order of reactions?
What characterizes the order of reactions?
Which of the following statements about the rate of a first-order reaction is accurate?
Which of the following statements about the rate of a first-order reaction is accurate?
Which assertion is true concerning the activated complex formed by a catalyst?
Which assertion is true concerning the activated complex formed by a catalyst?
Which statement about the reactions with fractional order is correct?
Which statement about the reactions with fractional order is correct?
What condition is necessary for successful collisions to lead to a reaction?
What condition is necessary for successful collisions to lead to a reaction?
Which statement is correct regarding the behavior of molecular collisions in a reaction?
Which statement is correct regarding the behavior of molecular collisions in a reaction?
What is the relationship between the reactants in a second-order reaction?
What is the relationship between the reactants in a second-order reaction?
For the reaction N2 (g) + 3H2 (g) ⇌ 2 NH3 (g), which option represents the correct rate relationship?
For the reaction N2 (g) + 3H2 (g) ⇌ 2 NH3 (g), which option represents the correct rate relationship?
What is the appropriate expression for the concentration of a pseudo unimolecular reaction?
What is the appropriate expression for the concentration of a pseudo unimolecular reaction?
In the context of a first-order reaction, what does a specific rate of 10 s^-1 indicate?
In the context of a first-order reaction, what does a specific rate of 10 s^-1 indicate?
Which statement is true regarding catalysts?
Which statement is true regarding catalysts?
In reaction kinetics, how is molecularity defined?
In reaction kinetics, how is molecularity defined?
Which of the following statements regarding reaction orientation is incorrect?
Which of the following statements regarding reaction orientation is incorrect?
What does the expression for a first-order reaction typically look like?
What does the expression for a first-order reaction typically look like?
Which statement correctly describes molecularity and its influence on reaction rate?
Which statement correctly describes molecularity and its influence on reaction rate?
What must be true for a reaction to proceed with a catalyst?
What must be true for a reaction to proceed with a catalyst?
Which statement about the slowest step in a reaction scheme is correct?
Which statement about the slowest step in a reaction scheme is correct?
Which of the following best describes the relationship between order and molecularity for a complex reaction?
Which of the following best describes the relationship between order and molecularity for a complex reaction?
Which of the following statements about reaction kinetics is incorrect?
Which of the following statements about reaction kinetics is incorrect?
Which of the following best defines a zero order reaction?
Which of the following best defines a zero order reaction?
Which statement is true regarding the relationship between kinetic energy and reaction progress?
Which statement is true regarding the relationship between kinetic energy and reaction progress?
Which of the following represents a correct matching between order of reaction and its corresponding expression for a zero order reaction?
Which of the following represents a correct matching between order of reaction and its corresponding expression for a zero order reaction?
How much time will it take for 20 g of the reactant to reduce to 5 g?
How much time will it take for 20 g of the reactant to reduce to 5 g?
What does the rate of a zero order reaction depend on?
What does the rate of a zero order reaction depend on?
Which of the following reactions is considered a first order reaction?
Which of the following reactions is considered a first order reaction?
What is the order of reaction for C12 H22 O11 + H2 O → C6 H12 O6?
What is the order of reaction for C12 H22 O11 + H2 O → C6 H12 O6?
Which matched pair correctly identifies the mathematical expression for the rate of reaction?
Which matched pair correctly identifies the mathematical expression for the rate of reaction?
In a second order reaction, the rate constant has what units?
In a second order reaction, the rate constant has what units?
What is the order of reaction for the following reaction: CH3 COOC2 H5 → CH3 COOH + C2 H5 OH?
What is the order of reaction for the following reaction: CH3 COOC2 H5 → CH3 COOH + C2 H5 OH?
For which expression does the rate of reaction change depending on both the reactants involved?
For which expression does the rate of reaction change depending on both the reactants involved?
What represents the overall reaction rate in systems with multiple steps?
What represents the overall reaction rate in systems with multiple steps?
Which order of reaction is characterized by a constant rate that does not change with concentration?
Which order of reaction is characterized by a constant rate that does not change with concentration?
What will be the order of the reaction with respect to M if its disappearance increases by a factor of 8 when its concentration is doubled?
What will be the order of the reaction with respect to M if its disappearance increases by a factor of 8 when its concentration is doubled?
If the temperature coefficient of a reaction is 2, how many times will the rate of reaction increase when the temperature is raised from 30°C to 90°C?
If the temperature coefficient of a reaction is 2, how many times will the rate of reaction increase when the temperature is raised from 30°C to 90°C?
Which of the following expressions correctly represents the rate for the reaction involving A and D2?
Which of the following expressions correctly represents the rate for the reaction involving A and D2?
Given the reaction 2SO2 + O2 ⇌ 2SO3, what is the rate of appearance of SO3 if the rate of disappearance of O2 is 2 × 10^-4 mol L-1 s-1?
Given the reaction 2SO2 + O2 ⇌ 2SO3, what is the rate of appearance of SO3 if the rate of disappearance of O2 is 2 × 10^-4 mol L-1 s-1?
What does an increase in temperature do to the rate of a chemical reaction?
What does an increase in temperature do to the rate of a chemical reaction?
Which assertion about reaction rates and temperature is true?
Which assertion about reaction rates and temperature is true?
What can be said about reactions of higher order?
What can be said about reactions of higher order?
When the concentration of a reactant is doubled and the rate increases by a factor of 8, which of the following is likely true about the reaction order?
When the concentration of a reactant is doubled and the rate increases by a factor of 8, which of the following is likely true about the reaction order?
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