Endothermic/exothermic reactions

Front

What are endothermic reactions?

Back

Endothermic reactions are chemical reactions that absorb energy from their surroundings, usually in the form of heat, resulting in a decrease in temperature.

Front

What are exothermic reactions?

Back

Exothermic reactions are chemical reactions that release energy to their surroundings, usually in the form of heat, resulting in an increase in temperature.

Front

What is an example of an endothermic reaction?

Back

Photosynthesis is an example of an endothermic reaction, where plants absorb energy from sunlight to convert carbon dioxide and water into glucose and oxygen.

Front

What is an example of an exothermic reaction?

Back

Combustion of fuels, such as burning wood or gasoline, is an example of an exothermic reaction, releasing heat and light.

Front

How do endothermic reactions feel to the touch?

Back

Endothermic reactions usually feel cold to the touch because they absorb heat from the surroundings.

Front

How do exothermic reactions feel to the touch?

Back

Exothermic reactions usually feel hot to the touch because they release heat into the surroundings.

Front

What is the general equation for an endothermic reaction?

Back

The general equation for an endothermic reaction can be represented as: Reactants + Energy → Products.

Front

What is the general equation for an exothermic reaction?

Back

The general equation for an exothermic reaction can be represented as: Reactants → Products + Energy.

Front

What type of reaction occurs in a hand warmer?

Back

A hand warmer typically involves an exothermic reaction, which releases heat to warm the hands.

Front

What happens to the temperature during an endothermic reaction?

Back

During an endothermic reaction, the temperature of the surroundings decreases as the reaction absorbs heat.