ENERGY AND CHANGE Flashcards
1
Q
Define heat of reaction
A
as the energy absorbed or released in a chemical reaction
2
Q
Define exothermic reactions
A
reactions that release energy
3
Q
Define endothermic reactions
A
reactions that absorb energy.
4
Q
Define activation energy
A
the minimum energy needed for a reaction to take place.
5
Q
Define an activated complex
A
the unstable transition state from reactants to products.
6
Q
Define reaction rate
A
the change in concentration of reactants or products per unit
time
7
Q
Define the term catalyst
A
a substance that increases the rate of a chemical reaction
without itself undergoing a permanent change.
8
Q
A
