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Thermodynamics: Internal Energy and Enthalpy 
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#1
Apr2412, 12:28 AM

P: 43

H = U+ pV
pV = nRT H= U+ nRT H= H (T) I dont understand the transition from U+ nRT to H (T) Can someone explain this? I get that H = U + pV But how is H= U+ nR 


#2
Apr2412, 02:14 AM

P: 261

For a monoatomic ideal gas, U=(3/2) PV. Hence, H=(5/2) PV=(5/2) nRT
Which shows that H for an ideal gas is a function of T alone ,i.e, H=H(T). Of course it is also function of n since it is extensive quantity. However, this dependence is easy to get rid of by defining h=H/n which is an intensive quantity. 


#3
Apr2412, 10:12 PM

P: 43

thank you...that clears it up!



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