Chapter 2-DF2 Flashcards
How much energy?
1
Q
What is Hess’s law?
A
The enthalpy change for any chemical reaction is independent for the intermediate stages, provided the initial and final conditions are the same for each route
2
Q
How can Hess’s law be used?
A
To calculate the standard enthalpy change of a reaction from a known standard enthalpy changes
3
Q
How can we describe the connection between ΔH1,2,3?
A
ΔH1 = ΔH2 + ΔH3
4
Q
What are the two types of enthalpy cycles, used in Hess’s law?
A
Enthalpy of formation-ΔfHθ
Enthalpy of combustion-ΔcHθ
