Question

Select the correct collision theory explanation for changing the rate of the given chemical reaction.

Answer 1

Explanation:

According to collision theory, more is the number of collisions between solute and solvent particles more will be the rate of reaction.

• Refrigerate food to keep it from spoiling - Here particles will collide with less force as decrease in temperature will cause an increase in potential energy of particles.
• Add inert water to a reaction solution - Here also particles will collide less frequently.
• Compress the air/fuel mixture inside an engine cylinder with a piston - Here particles will collide more frequently as increasing the pressure will bring the molecules close to each other and thus there will be more number of collisions.
• Raise the boiling point of water with a pressure cooker - Increase in temperature will also cause increase in number of collisions.
• Grind a metal into a fine powder - More surface area will also provide more number of collisions.

Answer 2

Refrigerate Food to Keep it from Spoiling

           - Particles collide with less force

Add inert water to a reaction solution

           - Particles collide less frequently

Compress the air/fuel mixture inside an engine cylinder with a piston

            - Particles collide more frequently

Raise the boiling point of water with a pressure cooker

            - Particles collide with more force

Grind a metal into a fine power

            - Particles collide more frequently