Thermodynamic Cycle Question

  • Thread starter NBAJam100
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Homework Statement



Im given a table with values for Delta(Internal energy), Delta(KE), Delta(PE), Delta(E), Q, and W.

For certain ones, certain values are missing and I have to fill in the blanks.

Specifically- D()= Delta
Process 1-2) D(U) =72, D(KE)= =5 , D(PE)= -6, D(E) = ? , Q=0 , W= ?
Process 2-3.) D(U)=64 , D(KE)=0 , D(PE) = ? , D(E) = ? , Q = 90, W= ?

Homework Equations



Delta(E)= Delta(U) +Delta(KE) + Delta(PE)

Delta(E)=Q-W

The Attempt at a Solution



For Process 1-2, I found the values of D(E) and W because there were only 2 unkowns so I could plug it into the given equations and solve for the unknowns. For Process 2-3 (And the rest of the remaining processes not listed) I have no idea what to do because there are 3 unknowns and 2 equations that I see fit to use. Ive tried re-arranging and plugging different values in but im stuck. Can someone give me a hand?
 

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