faithsmith7212 faithsmith7212
  • 19-07-2019
  • Engineering
contestada

At any given state the specific internal energy of a gas is always greater its specific enthalpy. a)True b) False

Respuesta :

Netta00 Netta00
  • 24-07-2019

Answer:

(b)False

Explanation:

We know that specific  Internal energy of gas u=[tex]C_v[/tex]T

      and specific enthalpy of gas h=[tex]C_p[/tex]T

If we take the case of air we know that

[tex]C_v[/tex]=0.707 KJ/Kg=K  , [tex]C_p[/tex]=1.005 KJ/Kg=K

If we take A fixed temperature T=300 K

so    u=212.1 KJ/ kg   ,h=301.5 KJ/kg

So we can say that specific enthaply of gas is always greater than its specific   internal energy.

                                 

     

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