Pressure Enthalpy diagram

[MartinST]

Can someone please help with pressure enthalpy software for various components?

[bmat]

you should define a EOS model to calculate the enthalpy departure from ideal gas values calculated with some correlation, there are examples with VBA of SRK or PR which you may adapt.
As alternative you may consider to link a simulator or a process library which does all the calc's, then you export to Excel or Matlab.
I have tested Prode Properties (see 'www.prode.com') which integrates directly with Excel and does all you need.

[carlo.stenali]

do you wish to calculate P-H graphs for pure fluids or mixtures?
For mixtures there are examples discussed here
'http://www.egpet.net/vb/threads/27092-Excel-library-for-process-calc-s-including-distillation?p=224959#post224959'

[pvaladares]

Can someone please help with pressure enthalpy software for various components?

I would recommend you to use EES (Engineering Equation Solver) software.