Kinetic Reaction Control

The video explains the concepts of kinetic and thermodynamic reaction control, using a car analogy to illustrate the differences. It discusses how activation energy and free energy changes influence reaction pathways and product stability. The role of temperature in determining which pathway is taken is also explored, showing how it affects the stability of products formed.

What is the main difference between kinetic and thermodynamic control in chemical reactions?

• Kinetic control is based on the stability of the products, while thermodynamic control is based on the speed of the reaction.

• Kinetic control is based on the temperature, while thermodynamic control is based on the pressure.

• Kinetic control is based on the speed of the reaction, while thermodynamic control is based on the stability of the products.

• Kinetic control is based on the amount of reactants, while thermodynamic control is based on the amount of products.

In the car analogy, what does the used car represent in terms of chemical reactions?

• A reaction with low free energy change

• A reaction with high free energy change

• A reaction with low activation energy

• A reaction with high activation energy

What role does activation energy play in determining the reaction pathway?

• It determines the final products of the reaction.

• It determines the speed at which the reaction occurs.

• It determines the stability of the reactants.

• It determines the initial cost of the reaction.

How does temperature influence the pathway of a chemical reaction?

• Temperature has no effect on reaction pathways.

• Higher temperatures can allow access to thermodynamic pathways.

• Lower temperatures always favor thermodynamic pathways.

• Higher temperatures always favor kinetic pathways.

Why might a thermodynamically favored reaction produce varying amounts of products?

• Because the reaction is not spontaneous.

• Because the reaction is controlled by kinetics at low temperatures.

• Because the reaction is controlled by pressure changes.

• Because the reaction is not influenced by temperature.