6.1 Rate of reaction

• The rate of reaction is defined as the change in concentration of reactants or products per unit time
• A catalyst lowers the activation energy required for a reaction, increasing its rate without being consumed.


  True
• Activation energy is the minimum energy needed for a reaction to start
• Activation energy is the energy required for all collisions, regardless of their effectiveness.

  False
• A catalyst provides an alternative reaction pathway with lower activation energy.
• A catalyst speeds up a reaction by lowering the activation energy barrier.
• Increasing temperature in the Maxwell-Boltzmann distribution shifts the curve to the right, indicating more particles with sufficient energy.


  True
• Increasing the concentration of reactants leads to more frequent collisions
• The rate of reaction is typically measured in units such as moles per second or grams per second
• Match the temperature with its effect on the Maxwell-Boltzmann distribution:

  Low Temperature ↔️ Fewer particles with activation energy

  High Temperature ↔️ More particles with activation energy
• What happens to the reaction rate when activation energy is higher?

  Reaction rate decreases
• How does increasing temperature affect the rate of reaction?

  Increases the rate
• What does the Maxwell-Boltzmann distribution describe?

  Kinetic energies of particles
• Match the activation energy level with its effect on reaction rate:

  High Activation Energy ↔️ Slower reaction rate

  Low Activation Energy ↔️ Faster reaction rate
• Enzymes are biological catalysts that accelerate reactions necessary for life.
• Increasing temperature increases the rate of reaction because it provides more kinetic energy to the reactant molecules.

  True
• Steps in the collision theory process

  1️⃣ Particles collide

  2️⃣ Collisions must have sufficient energy

  3️⃣ Molecules must be correctly oriented

  4️⃣ Reaction occurs if activation energy is exceeded
• Increased collision frequency always leads to a successful reaction.

  False
• A catalyst provides an alternative reaction pathway with lower activation energy
• The rate of reaction is measured in units such as moles per second or grams per second.


  True
• Match the factor with its effect on collision theory:

  Activation Energy ↔️ Higher energy collisions needed

  Collision Frequency ↔️ More collisions increase rate

  Molecular Orientation ↔️ Correct alignment for bond formation
• Activation energy is the minimum amount of energy required for a chemical reaction to occur.
• How does a catalyst lower activation energy?

  By providing an alternative pathway