unit 2 - Energy from fuels Flashcards
1
Q
what is a fuel
A
a substance which reacts exothermically with oxygen
2
Q
what is a combustion reaction
A
a reaction in which a substance reacts exothermically with oxygen
3
Q
in an exothermic reaction, the products must have _______?
A
less energy than the reactants (because heat energy is released)
4
Q
in an endothermic reaction, the products must have _______?
A
more energy than the reactants (because energy has been absorbed)
5
Q
explain what is meant by the term enthalpy
A
the difference in energy between the products and reactants
