U12 Kinetics and Equilibrium

Front

What is the effect of increasing surface area on the rate of reaction?

Back

Increasing the surface area of reactants allows more particles to collide, leading to a faster reaction rate.

Front

Define activation energy.

Back

Activation energy is the minimum energy required for a chemical reaction to occur.

Front

What does ΔH represent in a chemical reaction?

Back

ΔH represents the change in enthalpy, or heat content, during a reaction.

Front

How does a catalyst affect activation energy?

Back

A catalyst lowers the activation energy, allowing the reaction to proceed faster without being consumed.

Front

What is the relationship between temperature and reaction rate?

Back

Generally, increasing the temperature increases the reaction rate because particles move faster and collide more often.

Front

What is the effect of placing reactants in an ice bath on the rate of reaction?

Back

Placing reactants in an ice bath slows down the reaction rate due to decreased kinetic energy and fewer collisions.

Front

Explain the difference between exothermic and endothermic reactions.

Back

Exothermic reactions release heat (ΔH is negative), while endothermic reactions absorb heat (ΔH is positive).

Front

What is a reaction pathway in a chemical reaction?

Back

A reaction pathway is a diagram that shows the energy changes during the course of a reaction, including activation energy and ΔH.

Front

How can concentration affect the rate of a chemical reaction?

Back

Increasing the concentration of reactants generally increases the rate of reaction due to more frequent collisions.

Front

What is the role of a catalyst in a chemical reaction?

Back

A catalyst speeds up a reaction by providing an alternative pathway with a lower activation energy.