Chapter 7- energy changes Flashcards
1
Q
what is a combustion reaction?
A
a reaction with oxygen
2
Q
what is exothermic?
A
transfer energy, heat, to the surroundings. the reactants have more energy than the products
3
Q
what is endothermic?
A
taking in heat from the surroundings, an instant cold pack. the products have more energy than the reactants
4
Q
what is activation energy?
A
the energy which is required to start the reaction. lower-quicker.
5
Q
breaking bonds…
A
…requires energy
6
Q
making bonds…
A
energy is released
