Topic 2- Hess' Law Flashcards
1
Q
What does Hess’s law state?
A
Hess’s law states that the enthalpy change for a
chemical reaction is independent of the route taken.
2
Q
What is the enthalpy of combustion?
A
The enthalpy of combustion of a substance is the
enthalpy change when one mole of the substance
burns completely in oxygen.
3
Q
What may endothermic reactions require?
A
Endothermic reactions may incur costs in supplying
heat energy in order to maintain the reaction rate
4
Q
What may exothermic reactions require?
A
Exothermic reactions may require removal of heat
to prevent the temperature rising
