C19 - CALCULATING ENERGY CHANGES IN REACTIONS Flashcards
1
Q
What is the overall energy change in a reaction?
A
the difference between the energy needed to break bonds in reactants and the energy given out as new bonds form in the products
2
Q
Define bond energy.
A
the energy needed to break a bond
3
Q
What does it mean if an energy change is negative?
A
the reaction releases heat and is exothermic
4
Q
Is bond breaking exo or endothermic?
A
endothermic (involves energy being taken in)
5
Q
Is bond making exo or endothermic?
A
exothermic (involves energy being given out)
6
Q
A
