Exothermic & Endothermic Reactions

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases energy in the form of heat to its surroundings, causing the temperature of the surroundings to increase.

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs energy from its surroundings, resulting in a decrease in the temperature of the surroundings.

Front

What instrument is commonly used to measure temperature changes in chemical reactions?

Back

Thermometer.

Front

What happens to the surrounding temperature during an exothermic reaction?

Back

The surrounding temperature gets warmer.

Front

What happens to the surrounding temperature during an endothermic reaction?

Back

The surrounding temperature gets cooler.

Front

If a reaction starts at 20°C and ends at 45°C, is it exothermic or endothermic?

Back

Exothermic.

Front

If a reaction absorbs heat and feels cold to the touch, what type of reaction is it?

Back

Endothermic.

Front

What is the main difference between exothermic and endothermic reactions?

Back

Exothermic reactions release heat, while endothermic reactions absorb heat.

Front

Can you give an example of an exothermic reaction?

Back

Combustion of fuels, such as burning wood or gasoline.

Front

Can you give an example of an endothermic reaction?

Back

Photosynthesis in plants, where they absorb sunlight to convert carbon dioxide and water into glucose.