Rates of Reactions

Front

What is the collision theory in relation to chemical reactions?

Back

The collision theory states that for a reaction to occur, particles must collide with sufficient energy and correct orientation.

Front

What happens to the activation energy when a catalyst is added to a reaction?

Back

Adding a catalyst lowers the activation energy required for a reaction to occur.

Front

How does increasing surface area affect the rate of reaction?

Back

Increasing surface area increases the number of collisions among particles, thereby increasing the rate of reaction.

Front

Which factors affect the rate of reaction?

Back

Factors affecting reaction rate include temperature, concentration, surface area, and catalysts. Polarity does not affect reaction rate.

Front

What is surface area in the context of powdered sugar vs. solid sugar?

Back

Powdered sugar has a greater surface area than a solid cube of sugar, allowing for more collisions and faster reactions.

Front

Define activation energy.

Back

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

Front

What role do catalysts play in chemical reactions?

Back

Catalysts speed up chemical reactions by lowering the activation energy without being consumed in the process.

Front

Explain the importance of correct orientation in particle collisions.

Back

Correct orientation ensures that the colliding particles are aligned in a way that allows for the formation of products during a reaction.

Front

What is the effect of temperature on reaction rates?

Back

Increasing temperature generally increases reaction rates by providing more energy to the particles, leading to more frequent and effective collisions.

Front

How does concentration affect the rate of reaction?

Back

Higher concentration of reactants leads to more particles in a given volume, resulting in more frequent collisions and a faster reaction rate.