Chemical energy Flashcards
1
Q
If the enthalpy change is negative the reaction is…
A
Exothermic
2
Q
If the enthalpy change is positive the reaction is…
A
Endothermic
3
Q
Definition of the enthalpy of combustion:
A
The enthalpy change when one mole of a substance is burned completely in oxygen
4
Q
State Hess’s Law
A
The enthalpy change of a chemical reaction is independent of the route taken
5
Q
Breaking bonds ______ energy whereas making bonds ______ energy
A
Requires, releases
