energy change Flashcards
1
Q
the heat of the reaction
A
the net change of chemical potential energy of a system
2
Q
endothermic reaction
A
reaction which transforms thermal energy into chemical potential energy
🔼 >0
temp of surroundings decreases
more energy absorbed than released
3
Q
exothermic reaction
A
a reaction which transforms chemical potential energy into thermal energy
🔼 H <0
temperature of surroundings increase
more energy released than absorbed
4
Q
activation energy
A
the minimum energy required to start a chemical reaction
5
Q
bond energy
A
energy stored in a bond
energy needed to break a bond
energy released when a bond is broken
6
Q
activated complex
A
a high energy, unstable temporary transition state between the reactants and the products
