Exothermic & Endothermic Reactions Flashcards
1
Q
Chemical energy:
A
Energy that is stored in the chemical bonds of a substance.
2
Q
Activation Energy:
A
Energy required to break bonds in the reactants to form new products and hence bond.
3
Q
Exothermic Reaction:
A
Energy is released when new chemical bonds are made in the products.
- Negative enthalpy.
- Products feel hot.
4
Q
Endothermic Reaction:
A
Energy is supplied to break bonds of reactants
- Positive enthalpy.
- Products feel cold.
5
Q
Enthalpy:
A
Is the measure of total internal energy of a substance.
6
Q
Endothermic Diagram:
A
Activation energy>change enthalpy…Products have more energy than reactants.
7
Q
Exothermic Diagram:
A
Activation energy<Change in enthalpy… Products have less energy than reactants.
