Question

which topic is commonly used to explain activation energy and how chemical reactions happen?
○ reaction rate
○ collision theory
○ velocity distribution
○ spontaneous reaction

Explanation:

To determine the correct answer, we analyze each option:

• Reaction rate: Focuses on how fast a reaction occurs, not explaining activation energy or reaction occurrence mechanism.
• Collision theory: Explains that for a reaction to occur, particles must collide with sufficient energy (activation energy) and correct orientation. This directly relates to activation energy and how reactions happen.
• Velocity distribution: Deals with particle velocities in a system, not explaining reaction mechanisms or activation energy.
• Spontaneous reaction: Refers to reactions that occur without external energy input, but doesn't explain the mechanism or activation energy.

Answer:

B. collision theory