An ideal gas going through a cycle

[Ethan Godden]

Homework Statement

The problem is attached

Homework Equations

ΔE_int=Q+W
W=-PΔV

The Attempt at a Solution

Attempted solution is in the attachment. The problem is I am not getting the same answer as the supposed correct answer.

Thank You,

Ethan

 

[TSny]

Ethan,
I checked your work and it all looks very good to me. I think your answer is correct!