Chemistry-Heat Changes

?
What happens in a chemical reaction?
Elements/compounds react together to make new elements/compounds
1 of 7
If the energy released is greater than the energy absorbed, what happens?
An increase in temperature is observed and heat energy is given out.
2 of 7
If the energy released is less than the energy absorbed, what happens?
A decrease in temperature is observed and heat energy is taken in
3 of 7
What is an exothermic reaction?
One which gives out heat to its surroundings
4 of 7
What is an endothermic reaction?
One which takes in heat from its surroundings.
5 of 7
Examples of exothermic reactions.
Neutralisation, hydration, dilution, displacement and combustion.
6 of 7
Examples of endothermic reactions
Dissolving, thermal decomposition, photosynthesis, cooking, baking and making an anhydrous compound from a hydrate
7 of 7

Other cards in this set

Card 2

Front

If the energy released is greater than the energy absorbed, what happens?

Back

An increase in temperature is observed and heat energy is given out.

Card 3

Front

If the energy released is less than the energy absorbed, what happens?

Back

Preview of the front of card 3

Card 4

Front

What is an exothermic reaction?

Back

Preview of the front of card 4

Card 5

Front

What is an endothermic reaction?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Heat Changees resources »