Understanding Chemical Reactions: Collision Theory

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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?

Activation energy and correct orientation of collision (C) Signup and view all the answers

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

The energy and orientation of collision (A) Signup and view all the answers

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

Products (right side) (A) Signup and view all the answers

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

The increased kinetic energy of the particles leads to more collisions between them. (A) Signup and view all the answers

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

Increasing the concentration increases the reaction rate. (D) Signup and view all the answers

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

Pressure (D) Signup and view all the answers

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

Activation energy (A) Signup and view all the answers

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

Smaller particle size increases the surface area, leading to a faster reaction. (C) Signup and view all the answers

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

Properly oriented collisions increase the reaction rate. (A) Signup and view all the answers

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

The orientation of the particles during the collision (C) Signup and view all the answers

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

Activation energy (A) Signup and view all the answers

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

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 (C) Signup and view all the answers

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

The reaction rate doubles (A) Signup and view all the answers

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

The particles must come into contact with one another or collide (D) Signup and view all the answers

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

The particles will bounce off each other unchanged (B) Signup and view all the answers