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Find delta U, delta H

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I have review problems for an upcoming exam and what to make sure I know how to do these problems. I have some idea and some work but I would appreciate conformation. Please include work and explanation. Thank you for the assistance.

See the attached file.

2. The virial equation of state for NH3 (g) can be written as

Use the following data at 273 K to determine at 273 K
P/bar:
0.10
0.20
0.30
0.40
0.50
0.60
0.70

(Z-1)/10-4:
1.519
3.038
4.557
6.071
7.583
9.002
10.551.

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Solution Summary

A few thermodynamic quantities are calculated using the virial equation of state.

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In the virial equation of state,

Z = PV/ nRT

Hence Z - 1 = PV/nRT - 1 = ...

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