Thermal Process Formula Flashcards
1
Q
Work (for an isobaric process)
A
W = Fs = P(As) = PΔV
2
Q
Work (for an isochoric process)
A
W = PΔV = P x 0 = 0
3
Q
Internal energy (for an isochoric process)
A
ΔU = Q - W = Q - 0 = Q
4
Q
Work for an isothermal process
A
W = n x T x ln(V[f] / V[i])
5
Q
Internal energy for an isothermal process
A
U = 3 / 2 x n x R x ΔT = 0
temperature is held constant so no change
so:
ΔU = Q - W = 0
meaning Q = W
6
Q
Internal energy for an adiabatic process?
A
ΔU = Q - W = -W
since no flow in heat energy
