Find the enthalpy of Helium if its internal energy is 200 KJ/kg
h = _____ kJ/kg
Gives
U=200KJ/kg
U=mcvTH=mcpTU=mc_vT\\H=mc_pTU=mcvTH=mcpT
Now
HU=mcpTmcvTHU=cpcv\frac{H}{U}=\frac{mc_pT}{mc_vT}\\\frac{H}{U}=\frac{c_p}{c_v}UH=mcvTmcpTUH=cvcp
Helium is monoatomic
cpcv=53\frac{c_p}{c_v}=\frac{5}{3}cvcp=35
h=H=333.33kJ/kgh=H=333.33kJ/kgh=H=333.33kJ/kg
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