Enthalpy Flashcards
1
Q
What is the letter symbol for enthalpy?
A
H
2
Q
What is the units for enthalpy?
A
Jmol-1
3
Q
What is enthalpy?
A
Energy change in a system
4
Q
What is the equation for enthalpy?
A
H = U + PV
5
Q
What does H = U + PV stand for?
A
H = enthalpy U = internal energy P = pressure V = volume
6
Q
What is endothermic reaction?
A
More energy is needed to break bonds than what is released when new bonds are formed.
AKA have to put energy IN (energy IN is greater)
7
Q
What is exothermic reaction?
A
More energy released when bonds form than needed to break bonds.
AKA energy OUT is greater
8
Q
What is the equation for change in enthalpy?
A
delta H = delta U + delta (PV)
