Total Heat Flow Calculation for Isothermal Expansion of Diatomic Gas

[brandonmm1]

Homework Statement

n = 3.8-mol of diatomic gas is allowed to expand isothermally from Vini = 1.9-m3 to Vfin = 10.5-m3. The initial pressure is Pini = 1.38-atm. After this the gas is raised at a constant volume by a temperature ΔT = 35-K. Calculate the total heat flow into the gas.

Homework Equations

The Attempt at a Solution

 

[CWatters]

Please show your attempt at a solution (forum rules).

 

[brandonmm1]

Please show your attempt at a solution (forum rules).

I tried to use the Q=-W formula for isothermal. But I don't know how to find the W. Other than that, I also tried to use the graph and find the integral, but in using the graph some of the information given is not used(temperature)

 

[Chestermiller]

Assuming that the expansion is carried out reversibly, what is your algebraic result for the amount of work that is done?