Controlling Chemical Reactions Flashcards

Front

What happens to atoms during a chemical reaction?

Back

Atoms are rearranged to make new products, but no atoms are lost or gained.

Front

What is a chemical reaction?

Back

A process where one set of chemical compounds is transformed into another.

Front

What happens in an exothermic reaction?

Back

The temperature of the surroundings increases because energy is released.

Front

What happens in an endothermic reaction?

Back

The temperature of the surroundings decreases because energy is absorbed.

Front

.How does increasing the temperature affect the rate of a reaction?

Back

It increases the rate of reaction.

Front

What happens to the rate of reaction when the concentration of reactants is increased?

Back

The rate of reaction increases.

Front

How does particle size affect the rate of reaction?

Back

Smaller particles increase the surface area, which increases the rate of reaction.

Front

Increasing surface area increases the rate of reaction because more particles are exposed to react, so the reaction happens faster.

Back

More particles are exposed to react, so the reaction happens faster.

Front

How can you increase the rate of a chemical reaction?

Back

- Increase the temperature - Increase the concentration - Decrease particle size (increase surface area)

Front

What's the difference between an exothermic and endothermic reaction?

Back

- Exothermic: Releases energy, surroundings get hotter. - Endothermic: Absorbs energy, surroundings get cooler.