Boundary Work and Final Temperature in a Piston Cylinder

One tenth kilogram of Argon is contained in a piston-cylinder assembly. Initially at 4900 K and a volume of 40 liters, the gas undergoes an isobaric process during which the heat input is 30 kJ. Determine the boundary work and final temperature.

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T2 = ?
W= ?
Q= 30KJ
Q = n Cp (T2-T1)
30 = 1 Cp (T2 - 4900)
We need to know Cp for argon gas: by substituting we can find ...