Class 9 Science | Exothermic and Endothermic Reactions

Science and Technology, Class 9

Exothermic and Endothermic Reactions

Heat out or heat in · Activity 15.4

What we will be able to do

🔥

Recognise an exothermic reaction

🧊

Recognise an endothermic reaction

🧪

Show heat in an equation

🍚

Sort everyday examples

Activity 15.4

Feel the change

WATER

Pour water into a test tube.

ADD

Add sodium hydroxide or quicklime.

TOUCH

Touch the outside of the tube.

The notes are free to read in full.

Presenter notes: Today we learn to sort chemical reactions into two groups by what happens to heat.