THERMODYNAMIC PROCESSES FOR AN IDEAL GAS

PVn = Constant

Process
Isobaric
Isochoric
Isothermal
Adiabatic
Variable =>
Pressure
Volume
Tempemature.
No Heat Flow
Quantity Constant =>
ΔP = 0
ΔV = 0
ΔT = 0
Q = 0
n
0

1
γ = Cp/Cv
First Law
ΔU = Q - W
ΔU = Q
W = 0
ΔU = 0
Q = W
ΔU = -W
Q = 0
Work




0

Heat Flow

Q






0

Heat
Capacity







0

Internal Energy







0



Enthalpy







0



Entropy









0*

Ideal Gas
Relations






* For Adiabatic Reversible Processes
n cp = m Cp n cv = m C v cp - c v = R n R = N k

γ = Cp/Cv = c p/cv = Ratio of Specific Heats

Heat Capacities of Ideal Gas