Unit 5: Energy Exchange and Rate of Change

Front

What is an endothermic reaction?

Back

A reaction that absorbs heat from its surroundings, resulting in a decrease in temperature.

Front

What is a characteristic of an endothermic reaction?

Back

The product is cold to the touch.

Front

What is an exothermic reaction?

Back

A reaction that releases heat to its surroundings, resulting in an increase in temperature.

Front

What is a characteristic of an exothermic reaction?

Back

The product is hot to the touch.

Front

What does concentration mean in chemistry?

Back

The amount of a substance in a given volume; how close particles are to each other.

Front

How does increasing concentration affect reaction rate?

Back

It increases the number of particles in the same space, leading to more frequent collisions.

Front

What is an example of an endothermic reaction?

Back

Cold packs, which absorb heat to provide cooling.

Front

What is an example of an exothermic reaction?

Back

The combustion of wood, which releases heat.

Front

What is the role of temperature in chemical reactions?

Back

Temperature affects the energy of particles, influencing reaction rates.

Front

What is activation energy?

Back

The minimum energy required for a chemical reaction to occur.