4.1 Exothermic and endothermic reactions Flashcards
1
Q
what is termochemistry?
A
the study of heat changes during chemical reactions
2
Q
what happens when a chemical reaction takes place? (bonds)
A
chemical bonds break and new ones are formed
3
Q
what do you have to do to break bonds? (energy)
A
energy must be put in
4
Q
what do you do to form bonds? (energy)
A
energy must be given out
5
Q
exothermic
A
energy is given out
6
Q
endothermic
A
energy is taken in
7
Q
examples of exothermic reations
A
combustion
neutralisation reactions
8
Q
examples of endothermic reactions
A
decomposition
cold packs
alkane cracking
photosynthesis
