Understanding Chemical Reactions: Collision Theory
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Questions and Answers

What determines whether a reaction will occur between two particles that are colliding?

  • The speed of the particles
  • The energy of the particles and the correct orientation of collision (correct)
  • The size of the particles
  • The color of the particles

    • When two particles collide, what can occur if a chemical reaction happens?

  • The particles repel each other
  • The temperature decreases significantly
  • The particles merge into one large particle
  • The bonds between particles are broken and reformed (correct)

    • In a chemical reaction, what are the substances that enter and are changed called?

  • Catalysts
  • Products
  • Inhibitors
  • Reactants (correct)

    • What is needed for two substances to react according to the collision theory?

    <p>Activation energy and correct orientation of collision</p> Signup and view all the answers

    What is a factor that determines whether a reaction will occur between two colliding particles?

    <p>The energy and orientation of collision</p> Signup and view all the answers

    Which part of a chemical equation represents the substances that are formed?

    <p>Products (right side)</p> Signup and view all the answers

    What is the primary reason why increasing the temperature results in a faster chemical reaction?

    <p>The increased kinetic energy of the particles leads to more collisions between them.</p> Signup and view all the answers

    How does increasing the concentration of reactants affect the rate of a chemical reaction?

    <p>Increasing the concentration increases the reaction rate.</p> Signup and view all the answers

    Which of the following is NOT a factor that determines the rate of a chemical reaction?

    <p>Pressure</p> Signup and view all the answers

    Which of the following is the most important factor in determining whether a chemical reaction will occur?

    <p>Activation energy</p> Signup and view all the answers

    How does the particle size of a solid reactant affect the rate of a chemical reaction?

    <p>Smaller particle size increases the surface area, leading to a faster reaction.</p> Signup and view all the answers

    How does the orientation of collisions between reactant particles affect the rate of a chemical reaction?

    <p>Properly oriented collisions increase the reaction rate.</p> Signup and view all the answers

    What is the primary factor that determines whether a chemical reaction will occur when particles collide?

    <p>The orientation of the particles during the collision</p> Signup and view all the answers

    What is the term used to describe the minimum energy required for a chemical reaction to take place?

    <p>Activation energy</p> Signup and view all the answers

    Which of the following statements is true about the rate of a chemical reaction?

    <p>The rate of a reaction is a measure of both the decrease in concentration of reactants and the increase in concentration of products over time</p> Signup and view all the answers

    What happens when the temperature of a chemical reaction is increased by 10°C?

    <p>The reaction rate doubles</p> Signup and view all the answers

    Which of the following conditions is necessary for a chemical reaction to occur?

    <p>The particles must come into contact with one another or collide</p> Signup and view all the answers

    If the energy of the colliding particles is less than the activation energy, what is likely to happen?

    <p>The particles will bounce off each other unchanged</p> Signup and view all the answers

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