energy changes Flashcards
1
Q
exothermic
A
- temperature rise
- give out heat energy
2
Q
exothermic products
A
self heating cans
hand warmers
3
Q
endothermic
A
- falls in temperature
- take in heat energy
4
Q
endothermic uses
A
sport injury packs
5
Q
measuring exothermic
A
- combustion
- oxidation reactions
- neutralisation
6
Q
measuring endothermic
A
-thermal decomposition of metal carbonates
7
Q
in a chemical reaction, new substances are produced:
A
- the bonds in the reactants are broken
- new bonds are made to form the products
8
Q
breaking a chemical bond
A
requires energy (endothermic)
9
Q
new chemical bond is formed
A
energy is given out
exothermic
