IDEAL GASES
***State: Gas***
***state does not change during a process***
1. Monoatomic gases (Ar, He) γ = 1.6
2. Diatomic gases (air, O 2 , N 2 , H 2 ) γ = 1.4
3. Triatomic gases (CO 2 , SO 2 ) γ = 1.3
Equations
P*V = m*R*T V = volume in m 3
P*v = R*T v = specific volume in m 3 /kg
u = c v *T u = internal energy in kJ/kg
c v = specific heat kJ/kg.K (constant volume)
Δu = u 2 –u 1 = c v *(T 2 -T 1 )
h = cp*T h = enthalpy in kJ/kg
c p = specific heat kJ/kg.K (constant pressure)
Δh = h 2 –h 1 = c p *(T 2 -T 1 )
h = u + Pv
Properties: P, T, V, v, u, h ***use equations***
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