5.1

• What is the relationship between the concentration of NO2 and the temperature (1/T) shown in the graph?

  • As the temperature (1/T) increases, the concentration of NO2 decreases.
  • The graph shows an inverse relationship between NO2 concentration and temperature.
• What is the pre-exponential factor in the Arrhenius equation represented by?

  A
• How does the concept of the pre-exponential factor help in understanding chemical kinetics?

  It provides insight into collision frequency
• How does a lower activation energy (Ea) influence reaction speed?

  It makes reactions happen faster
• What is the chemical reaction represented in the image?

  2NO2 → 2NO + O2
• What is the relationship between temperature and reaction rate?

  • Higher temperature increases reaction rate
  • Particles move faster and collide more
  • Similar to shaking a box of toys
• How do you plug values into the Arrhenius equation?

  Use $k =$$A *$$e^{ - Ea / (R * T)}$
• What does the pre-exponential factor help us understand?

  How fast a chemical reaction is happening
• What does 'R' represent in the Arrhenius equation?

  Gas constant (8.314 J/mol·K)
• In what fields is the Arrhenius equation used?

  Cooking, chemistry, and material science
• What does 'Ea' stand for in the Arrhenius equation?

  Activation energy
• What does the pre-exponential factor indicate?

  Frequency of collisions in a reaction
• What is the gradient of the line produced by ln(k) vs 1/T?

  -Ea/R
• How does temperature (T) affect the reaction rate according to the Arrhenius equation?

  It influences collision frequency and activation energy
• What does a larger pre-exponential factor imply about particle movement?

  Particles are moving and colliding more
• What does 'A' represent in the Arrhenius equation?

  Pre-exponential factor
• If the temperature is 0.00165 K^-1, what is the approximate concentration of NO2?

  1.5 mol/L
• How does increasing temperature affect the cooking of an egg?

  It cooks the egg faster
• How does shaking a box of toys relate to chemical reactions?

  More shaking increases particle collisions
• How does the pre-exponential factor relate to chemical reaction speed?

  It indicates how fast reactions occur
• How does temperature affect the rate constant according to the Arrhenius equation?

  Increasing temperature increases the rate constant
• What are the units of the activation energy (Ea)?

  J/mol
• What happens to particles in a chemical reaction as temperature increases?

  They move faster and collide more
• What is the role of the gas constant (R) in the Arrhenius equation?

  Converts between energy units and temperature
• What does the rate constant indicate in a chemical reaction?

  How fast the reaction occurs
• What is the value of the gas constant (R)?

  8.314 J/mol·K
• What is the first step in solving problems using the Arrhenius equation?

  Identify given values: Ea, A, T, R
• What is the activation energy (Ea) in the context of the Arrhenius equation?

  The energy required to start a reaction
• What does the Arrhenius equation reveal about reaction rates at higher temperatures?

  Faster reaction rates at higher temperatures
• What are the four key components of the Arrhenius equation?

  • A: Pre-exponential factor
  • Ea: Activation energy (J/mol)
  • R: Gas constant (8.314 J/mol·K)
  • T: Temperature (K)
• If given $A =$$5.0 \times 10^{12} s^{ - 1}$, $Ea =$$150 kJ / mol$, and $T =$$300 K$, what is the first step to calculate k?


  Convert Ea to J/mol
• What are the key components of the Arrhenius equation and their significance?

  • Pre-exponential factor (A): Frequency of collisions; higher A = faster reactions
  • Activation energy (Ea): Minimum energy for reaction; lower Ea = faster reactions
  • Gas constant (R): Converts energy units and temperature
  • Temperature (T): Influences collision frequency; higher T = faster rate constant
• What does the pre-exponential factor (A) represent in the Arrhenius equation?

  Frequency of collisions between reacting particles
• If the pre-exponential factor is low, what can be inferred about the reaction rate?

  The reaction rate is likely slow
• What is activation energy?

  Minimum energy needed for a reaction
• What does the Arrhenius equation describe?

  Relationship between reaction rate and temperature
• How does the number of toys in a box affect their collisions when shaken?

  More toys lead to more collisions
• What is the overall effect of increasing temperature on chemical reactions?

  It increases the rate of chemical reactions
• What is activation energy ($E_a$) in the context of the Arrhenius equation?


  Energy needed for particles to react
• What does the Arrhenius equation describe?

  Relationship between rate constant and temperature