Thermodynamics - Enthalpy Flashcards
1
Q
What does H represent?
A
Enthalpy
2
Q
If ΔH < 0 the reaction is…
A
Exothermic
3
Q
If ΔH > 0 the reaction is…
A
Endothermic
4
Q
What is C(V,m)?
A
The molar heat capacity at a constant volume
5
Q
What is C(P,m)?
A
The molar heat capacity at a constant pressure
6
Q
What logic applies to state functions such as enthalpy (H) and internal energy (U)?
A
ΔX = X(final) - X(initial)
7
Q
What does U represent?
A
Internal energy
8
Q
What is the relationship between ΔH and ΔU if the temperature is constant?
A
ΔH = ΔU + RTΔng
9
Q
What is the relationship between ΔH and ΔU if the pressure is constant?
A
ΔH = ΔU + nRΔT
10
Q
What does ΔH°c denote?
A
The enthalpy of combustion
11
Q
What is the value of the standard enthalpy in the most stable form?
A
ΔH°f = 0
