c3.2 Flashcards
(4 cards)
1
Q
exothermic
A
temp of reaction mixture increases during chemical reaction
energy transferred from surroundings to reaction
eg - combustion, neutralisation
amount of energy transferred to break bonds is less than energy transferred when new bonds form.
reactant at top
2
Q
endothermic
A
temp of reaction mixture decreases during chemical reaction
energy transferred from reaction to surroundings
amount of energy transferred to break bonds more than the energy transferred when new bonds form
reactant at bottom
3
Q
activation energy
A
amount of energy required for reaction to start
4
Q
energy change
A
energy of reactant - energy of products
